contestId int64 0 1.01k | index stringclasses 57
values | name stringlengths 2 58 | type stringclasses 2
values | rating int64 0 3.5k | tags listlengths 0 11 | title stringclasses 522
values | time-limit stringclasses 8
values | memory-limit stringclasses 8
values | problem-description stringlengths 0 7.15k | input-specification stringlengths 0 2.05k | output-specification stringlengths 0 1.5k | demo-input listlengths 0 7 | demo-output listlengths 0 7 | note stringlengths 0 5.24k | points float64 0 425k | test_cases listlengths 0 402 | creationTimeSeconds int64 1.37B 1.7B | relativeTimeSeconds int64 8 2.15B | programmingLanguage stringclasses 3
values | verdict stringclasses 14
values | testset stringclasses 12
values | passedTestCount int64 0 1k | timeConsumedMillis int64 0 15k | memoryConsumedBytes int64 0 805M | code stringlengths 3 65.5k | prompt stringlengths 262 8.2k | response stringlengths 17 65.5k | score float64 -1 3.99 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
620 | A | Professor GukiZ's Robot | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | Professor GukiZ makes a new robot. The robot are in the point with coordinates (*x*1,<=*y*1) and should go to the point (*x*2,<=*y*2). In a single step the robot can change any of its coordinates (maybe both of them) by one (decrease or increase). So the robot can move in one of the 8 directions. Find the minimal numbe... | The first line contains two integers *x*1,<=*y*1 (<=-<=109<=≤<=*x*1,<=*y*1<=≤<=109) — the start position of the robot.
The second line contains two integers *x*2,<=*y*2 (<=-<=109<=≤<=*x*2,<=*y*2<=≤<=109) — the finish position of the robot. | Print the only integer *d* — the minimal number of steps to get the finish position. | [
"0 0\n4 5\n",
"3 4\n6 1\n"
] | [
"5\n",
"3\n"
] | In the first example robot should increase both of its coordinates by one four times, so it will be in position (4, 4). After that robot should simply increase its *y* coordinate and get the finish position.
In the second example robot should simultaneously increase *x* coordinate and decrease *y* coordinate by one th... | 0 | [
{
"input": "0 0\n4 5",
"output": "5"
},
{
"input": "3 4\n6 1",
"output": "3"
},
{
"input": "0 0\n4 6",
"output": "6"
},
{
"input": "1 1\n-3 -5",
"output": "6"
},
{
"input": "-1 -1\n-10 100",
"output": "101"
},
{
"input": "1 -1\n100 -100",
"output":... | 1,605,187,029 | 2,147,483,647 | Python 3 | OK | TESTS | 75 | 109 | 0 | # https://codeforces.com/problemset/problem/620/A
x1, y1 = map(int, input().split())
x2, y2 = map(int, input().split())
print(max(abs(x1 - x2), abs(y1 - y2)))
| Title: Professor GukiZ's Robot
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Professor GukiZ makes a new robot. The robot are in the point with coordinates (*x*1,<=*y*1) and should go to the point (*x*2,<=*y*2). In a single step the robot can change any of its coordinates (maybe both of ... | ```python
# https://codeforces.com/problemset/problem/620/A
x1, y1 = map(int, input().split())
x2, y2 = map(int, input().split())
print(max(abs(x1 - x2), abs(y1 - y2)))
``` | 3 | |
432 | A | Choosing Teams | PROGRAMMING | 800 | [
"greedy",
"implementation",
"sortings"
] | null | null | The Saratov State University Olympiad Programmers Training Center (SSU OPTC) has *n* students. For each student you know the number of times he/she has participated in the ACM ICPC world programming championship. According to the ACM ICPC rules, each person can participate in the world championship at most 5 times.
Th... | The first line contains two integers, *n* and *k* (1<=≤<=*n*<=≤<=2000; 1<=≤<=*k*<=≤<=5). The next line contains *n* integers: *y*1,<=*y*2,<=...,<=*y**n* (0<=≤<=*y**i*<=≤<=5), where *y**i* shows the number of times the *i*-th person participated in the ACM ICPC world championship. | Print a single number — the answer to the problem. | [
"5 2\n0 4 5 1 0\n",
"6 4\n0 1 2 3 4 5\n",
"6 5\n0 0 0 0 0 0\n"
] | [
"1\n",
"0\n",
"2\n"
] | In the first sample only one team could be made: the first, the fourth and the fifth participants.
In the second sample no teams could be created.
In the third sample two teams could be created. Any partition into two teams fits. | 500 | [
{
"input": "5 2\n0 4 5 1 0",
"output": "1"
},
{
"input": "6 4\n0 1 2 3 4 5",
"output": "0"
},
{
"input": "6 5\n0 0 0 0 0 0",
"output": "2"
},
{
"input": "3 4\n0 1 0",
"output": "1"
},
{
"input": "3 4\n0 2 0",
"output": "0"
},
{
"input": "6 5\n0 0 0 0 0... | 1,671,466,089 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 46 | 0 | v=0
n=0
x=list(map(int,input().split()))
c=list(map(int,input().split()))
for i in range(len(c)):
c[i]+=x[1]
if c[i]<=5:
v+=1
if v%3==0:
n+=1
print(n) | Title: Choosing Teams
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Saratov State University Olympiad Programmers Training Center (SSU OPTC) has *n* students. For each student you know the number of times he/she has participated in the ACM ICPC world programming championship. Accordi... | ```python
v=0
n=0
x=list(map(int,input().split()))
c=list(map(int,input().split()))
for i in range(len(c)):
c[i]+=x[1]
if c[i]<=5:
v+=1
if v%3==0:
n+=1
print(n)
``` | 3 | |
1,011 | A | Stages | PROGRAMMING | 900 | [
"greedy",
"implementation",
"sortings"
] | null | null | Natasha is going to fly to Mars. She needs to build a rocket, which consists of several stages in some order. Each of the stages is defined by a lowercase Latin letter. This way, the rocket can be described by the string — concatenation of letters, which correspond to the stages.
There are $n$ stages available. The ro... | The first line of input contains two integers — $n$ and $k$ ($1 \le k \le n \le 50$) – the number of available stages and the number of stages to use in the rocket.
The second line contains string $s$, which consists of exactly $n$ lowercase Latin letters. Each letter defines a new stage, which can be used to build th... | Print a single integer — the minimal total weight of the rocket or -1, if it is impossible to build the rocket at all. | [
"5 3\nxyabd\n",
"7 4\nproblem\n",
"2 2\nab\n",
"12 1\nabaabbaaabbb\n"
] | [
"29",
"34",
"-1",
"1"
] | In the first example, the following rockets satisfy the condition:
- "adx" (weight is $1+4+24=29$);- "ady" (weight is $1+4+25=30$);- "bdx" (weight is $2+4+24=30$);- "bdy" (weight is $2+4+25=31$).
Rocket "adx" has the minimal weight, so the answer is $29$.
In the second example, target rocket is "belo". Its weight ... | 500 | [
{
"input": "5 3\nxyabd",
"output": "29"
},
{
"input": "7 4\nproblem",
"output": "34"
},
{
"input": "2 2\nab",
"output": "-1"
},
{
"input": "12 1\nabaabbaaabbb",
"output": "1"
},
{
"input": "50 13\nqwertyuiopasdfghjklzxcvbnmaaaaaaaaaaaaaaaaaaaaaaaa",
"output": ... | 1,532,624,471 | 6,971 | Python 3 | RUNTIME_ERROR | PRETESTS | 0 | 93 | 0 | x,y = map(int, input().split())
#a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26
dct = {'a':1,'b':2,'c':3,'d':4,'e':5,'f':6,'g':7,'h':8,'i':9,'j':10,'k':11,'l':12,'m':13,'n':14,'o':15,'p':16,'q':17,'r':18,'s':19,'t':20,'u':21,'v':22,'w':23,'x':2... | Title: Stages
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Natasha is going to fly to Mars. She needs to build a rocket, which consists of several stages in some order. Each of the stages is defined by a lowercase Latin letter. This way, the rocket can be described by the string — conca... | ```python
x,y = map(int, input().split())
#a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z=1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26
dct = {'a':1,'b':2,'c':3,'d':4,'e':5,'f':6,'g':7,'h':8,'i':9,'j':10,'k':11,'l':12,'m':13,'n':14,'o':15,'p':16,'q':17,'r':18,'s':19,'t':20,'u':21,'v':22,'w... | -1 | |
864 | A | Fair Game | PROGRAMMING | 1,000 | [
"implementation",
"sortings"
] | null | null | Petya and Vasya decided to play a game. They have *n* cards (*n* is an even number). A single integer is written on each card.
Before the game Petya will choose an integer and after that Vasya will choose another integer (different from the number that Petya chose). During the game each player takes all the cards with... | The first line contains a single integer *n* (2<=≤<=*n*<=≤<=100) — number of cards. It is guaranteed that *n* is an even number.
The following *n* lines contain a sequence of integers *a*1,<=*a*2,<=...,<=*a**n* (one integer per line, 1<=≤<=*a**i*<=≤<=100) — numbers written on the *n* cards. | If it is impossible for Petya and Vasya to choose numbers in such a way that the game will be fair, print "NO" (without quotes) in the first line. In this case you should not print anything more.
In the other case print "YES" (without quotes) in the first line. In the second line print two distinct integers — number t... | [
"4\n11\n27\n27\n11\n",
"2\n6\n6\n",
"6\n10\n20\n30\n20\n10\n20\n",
"6\n1\n1\n2\n2\n3\n3\n"
] | [
"YES\n11 27\n",
"NO\n",
"NO\n",
"NO\n"
] | In the first example the game will be fair if, for example, Petya chooses number 11, and Vasya chooses number 27. Then the will take all cards — Petya will take cards 1 and 4, and Vasya will take cards 2 and 3. Thus, each of them will take exactly two cards.
In the second example fair game is impossible because the nu... | 500 | [
{
"input": "4\n11\n27\n27\n11",
"output": "YES\n11 27"
},
{
"input": "2\n6\n6",
"output": "NO"
},
{
"input": "6\n10\n20\n30\n20\n10\n20",
"output": "NO"
},
{
"input": "6\n1\n1\n2\n2\n3\n3",
"output": "NO"
},
{
"input": "2\n1\n100",
"output": "YES\n1 100"
},
... | 1,563,610,226 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 109 | 0 | t = int(input())
d = {}
for i in range(t):
l = int(input())
if l in d:
d[l] = d[l] + 1
else:
d[l] = 1
k = 0
for i in d:
if d[i]%2 == 1:
print("NO")
k = 1
break
if len(d)%2 == 1:
print("NO")
elif k == 0:
print("YES")
for i in d:
print(i,end=" ") | Title: Fair Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Petya and Vasya decided to play a game. They have *n* cards (*n* is an even number). A single integer is written on each card.
Before the game Petya will choose an integer and after that Vasya will choose another integer (di... | ```python
t = int(input())
d = {}
for i in range(t):
l = int(input())
if l in d:
d[l] = d[l] + 1
else:
d[l] = 1
k = 0
for i in d:
if d[i]%2 == 1:
print("NO")
k = 1
break
if len(d)%2 == 1:
print("NO")
elif k == 0:
print("YES")
for i in d:
print(i,end=" ")
``` | 0 | |
950 | A | Left-handers, Right-handers and Ambidexters | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | You are at a water bowling training. There are *l* people who play with their left hand, *r* people, who play with their right hand, and *a* ambidexters, who can play with left or right hand.
The coach decided to form a team of even number of players, exactly half of the players should play with their right hand, and ... | The only line contains three integers *l*, *r* and *a* (0<=≤<=*l*,<=*r*,<=*a*<=≤<=100) — the number of left-handers, the number of right-handers and the number of ambidexters at the training. | Print a single even integer — the maximum number of players in the team. It is possible that the team can only have zero number of players. | [
"1 4 2\n",
"5 5 5\n",
"0 2 0\n"
] | [
"6\n",
"14\n",
"0\n"
] | In the first example you can form a team of 6 players. You should take the only left-hander and two ambidexters to play with left hand, and three right-handers to play with right hand. The only person left can't be taken into the team.
In the second example you can form a team of 14 people. You have to take all five l... | 500 | [
{
"input": "1 4 2",
"output": "6"
},
{
"input": "5 5 5",
"output": "14"
},
{
"input": "0 2 0",
"output": "0"
},
{
"input": "30 70 34",
"output": "128"
},
{
"input": "89 32 24",
"output": "112"
},
{
"input": "89 44 77",
"output": "210"
},
{
... | 1,579,158,264 | 2,147,483,647 | Python 3 | OK | TESTS | 79 | 109 | 307,200 | i1,i2,a=map(int,input().split())
l=min(i1,i2)
r=max(i1,i2)
if(a>=r-l):
a-=r-l
print(r*2+a-a%2)
else:
print((l+a)*2) | Title: Left-handers, Right-handers and Ambidexters
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are at a water bowling training. There are *l* people who play with their left hand, *r* people, who play with their right hand, and *a* ambidexters, who can play with left or right hand.... | ```python
i1,i2,a=map(int,input().split())
l=min(i1,i2)
r=max(i1,i2)
if(a>=r-l):
a-=r-l
print(r*2+a-a%2)
else:
print((l+a)*2)
``` | 3 | |
137 | B | Permutation | PROGRAMMING | 1,000 | [
"greedy"
] | null | null | "Hey, it's homework time" — thought Polycarpus and of course he started with his favourite subject, IT. Polycarpus managed to solve all tasks but for the last one in 20 minutes. However, as he failed to solve the last task after some considerable time, the boy asked you to help him.
The sequence of *n* integers is cal... | The first line of the input data contains an integer *n* (1<=≤<=*n*<=≤<=5000) which represents how many numbers are in the sequence. The second line contains a sequence of integers *a**i* (1<=≤<=*a**i*<=≤<=5000,<=1<=≤<=*i*<=≤<=*n*). | Print the only number — the minimum number of changes needed to get the permutation. | [
"3\n3 1 2\n",
"2\n2 2\n",
"5\n5 3 3 3 1\n"
] | [
"0\n",
"1\n",
"2\n"
] | The first sample contains the permutation, which is why no replacements are required.
In the second sample it is enough to replace the first element with the number 1 and that will make the sequence the needed permutation.
In the third sample we can replace the second element with number 4 and the fourth element with... | 1,000 | [
{
"input": "3\n3 1 2",
"output": "0"
},
{
"input": "2\n2 2",
"output": "1"
},
{
"input": "5\n5 3 3 3 1",
"output": "2"
},
{
"input": "5\n6 6 6 6 6",
"output": "5"
},
{
"input": "10\n1 1 2 2 8 8 7 7 9 9",
"output": "5"
},
{
"input": "8\n9 8 7 6 5 4 3 2"... | 1,670,226,135 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 60 | 0 |
n = int(input())
li = list(map(int, input().split()))
print(li)
li = sorted(li)
ans = 0
for i in range(len(li)):
if i + 1 != li[i]:
ans += 1
print(ans) | Title: Permutation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
"Hey, it's homework time" — thought Polycarpus and of course he started with his favourite subject, IT. Polycarpus managed to solve all tasks but for the last one in 20 minutes. However, as he failed to solve the last task ... | ```python
n = int(input())
li = list(map(int, input().split()))
print(li)
li = sorted(li)
ans = 0
for i in range(len(li)):
if i + 1 != li[i]:
ans += 1
print(ans)
``` | 0 | |
508 | B | Anton and currency you all know | PROGRAMMING | 1,300 | [
"greedy",
"math",
"strings"
] | null | null | Berland, 2016. The exchange rate of currency you all know against the burle has increased so much that to simplify the calculations, its fractional part was neglected and the exchange rate is now assumed to be an integer.
Reliable sources have informed the financier Anton of some information about the exchange rate of... | The first line contains an odd positive integer *n* — the exchange rate of currency you all know for today. The length of number *n*'s representation is within range from 2 to 105, inclusive. The representation of *n* doesn't contain any leading zeroes. | If the information about tomorrow's exchange rate is inconsistent, that is, there is no integer that meets the condition, print <=-<=1.
Otherwise, print the exchange rate of currency you all know against the burle for tomorrow. This should be the maximum possible number of those that are even and that are obtained fro... | [
"527\n",
"4573\n",
"1357997531\n"
] | [
"572\n",
"3574\n",
"-1\n"
] | none | 1,000 | [
{
"input": "527",
"output": "572"
},
{
"input": "4573",
"output": "3574"
},
{
"input": "1357997531",
"output": "-1"
},
{
"input": "444443",
"output": "444434"
},
{
"input": "22227",
"output": "72222"
},
{
"input": "24683",
"output": "34682"
},
... | 1,680,291,113 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 3 | 62 | 0 | n=input()
ans=1
for i in range(len(n)):
if int(n[i])%2==0:
print(n[:i]+n[-1]+n[i+1:-1]+n[i])
ans=0
break
if ans:
print(-1) | Title: Anton and currency you all know
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Berland, 2016. The exchange rate of currency you all know against the burle has increased so much that to simplify the calculations, its fractional part was neglected and the exchange rate is now assumed... | ```python
n=input()
ans=1
for i in range(len(n)):
if int(n[i])%2==0:
print(n[:i]+n[-1]+n[i+1:-1]+n[i])
ans=0
break
if ans:
print(-1)
``` | 0 | |
723 | A | The New Year: Meeting Friends | PROGRAMMING | 800 | [
"implementation",
"math",
"sortings"
] | null | null | There are three friend living on the straight line *Ox* in Lineland. The first friend lives at the point *x*1, the second friend lives at the point *x*2, and the third friend lives at the point *x*3. They plan to celebrate the New Year together, so they need to meet at one point. What is the minimum total distance they... | The first line of the input contains three distinct integers *x*1, *x*2 and *x*3 (1<=≤<=*x*1,<=*x*2,<=*x*3<=≤<=100) — the coordinates of the houses of the first, the second and the third friends respectively. | Print one integer — the minimum total distance the friends need to travel in order to meet together. | [
"7 1 4\n",
"30 20 10\n"
] | [
"6\n",
"20\n"
] | In the first sample, friends should meet at the point 4. Thus, the first friend has to travel the distance of 3 (from the point 7 to the point 4), the second friend also has to travel the distance of 3 (from the point 1 to the point 4), while the third friend should not go anywhere because he lives at the point 4. | 500 | [
{
"input": "7 1 4",
"output": "6"
},
{
"input": "30 20 10",
"output": "20"
},
{
"input": "1 4 100",
"output": "99"
},
{
"input": "100 1 91",
"output": "99"
},
{
"input": "1 45 100",
"output": "99"
},
{
"input": "1 2 3",
"output": "2"
},
{
"... | 1,683,207,087 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 48 | 62 | 0 | a,b,c=input().split()
a,b,c=int(a),int(b),int(c)
print(max(a,b,c)-min(a,b,c)) | Title: The New Year: Meeting Friends
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are three friend living on the straight line *Ox* in Lineland. The first friend lives at the point *x*1, the second friend lives at the point *x*2, and the third friend lives at the point *x*3. They ... | ```python
a,b,c=input().split()
a,b,c=int(a),int(b),int(c)
print(max(a,b,c)-min(a,b,c))
``` | 3 | |
181 | A | Series of Crimes | PROGRAMMING | 800 | [
"brute force",
"geometry",
"implementation"
] | null | null | The Berland capital is shaken with three bold crimes committed by the Pihsters, a notorious criminal gang.
The Berland capital's map is represented by an *n*<=×<=*m* rectangular table. Each cell of the table on the map represents some districts of the capital.
The capital's main detective Polycarpus took a map and m... | The first line contains two space-separated integers *n* and *m* (2<=≤<=*n*,<=*m*<=≤<=100) — the number of rows and columns in the table, correspondingly.
Each of the next *n* lines contains *m* characters — the description of the capital's map. Each character can either be a "." (dot), or an "*" (asterisk). A charact... | Print two integers — the number of the row and the number of the column of the city district that is the fourth one to be robbed. The rows are numbered starting from one from top to bottom and the columns are numbered starting from one from left to right. | [
"3 2\n.*\n..\n**\n",
"3 3\n*.*\n*..\n...\n"
] | [
"1 1\n",
"2 3\n"
] | none | 500 | [
{
"input": "3 2\n.*\n..\n**",
"output": "1 1"
},
{
"input": "2 5\n*....\n*...*",
"output": "1 5"
},
{
"input": "7 2\n..\n**\n..\n..\n..\n..\n.*",
"output": "7 1"
},
{
"input": "7 2\n*.\n..\n..\n..\n..\n..\n**",
"output": "1 2"
},
{
"input": "2 10\n*......*..\n....... | 1,667,744,957 | 2,147,483,647 | PyPy 3 | OK | TESTS | 36 | 184 | 1,433,600 | m,n=map(int,input().split())
x=0;y=0;
for i in range(m):
l=input()
for j in range(n):
if l[j]=="*":
x^=i
y^=j
print(x+1,y+1)
| Title: Series of Crimes
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Berland capital is shaken with three bold crimes committed by the Pihsters, a notorious criminal gang.
The Berland capital's map is represented by an *n*<=×<=*m* rectangular table. Each cell of the table on the ma... | ```python
m,n=map(int,input().split())
x=0;y=0;
for i in range(m):
l=input()
for j in range(n):
if l[j]=="*":
x^=i
y^=j
print(x+1,y+1)
``` | 3 | |
514 | A | Chewbaсca and Number | PROGRAMMING | 1,200 | [
"greedy",
"implementation"
] | null | null | Luke Skywalker gave Chewbacca an integer number *x*. Chewbacca isn't good at numbers but he loves inverting digits in them. Inverting digit *t* means replacing it with digit 9<=-<=*t*.
Help Chewbacca to transform the initial number *x* to the minimum possible positive number by inverting some (possibly, zero) digits.... | The first line contains a single integer *x* (1<=≤<=*x*<=≤<=1018) — the number that Luke Skywalker gave to Chewbacca. | Print the minimum possible positive number that Chewbacca can obtain after inverting some digits. The number shouldn't contain leading zeroes. | [
"27\n",
"4545\n"
] | [
"22\n",
"4444\n"
] | none | 500 | [
{
"input": "27",
"output": "22"
},
{
"input": "4545",
"output": "4444"
},
{
"input": "1",
"output": "1"
},
{
"input": "9",
"output": "9"
},
{
"input": "8772",
"output": "1222"
},
{
"input": "81",
"output": "11"
},
{
"input": "71723447",
... | 1,683,829,845 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 31 | 0 | x=input()
s=""
for i in range(len(x)):
if int(x[i])>4 and i!=0 and x[0]!='9':
s+=str(9-int(x[i]))
else:
s+=x[i]
print(s)
| Title: Chewbaсca and Number
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Luke Skywalker gave Chewbacca an integer number *x*. Chewbacca isn't good at numbers but he loves inverting digits in them. Inverting digit *t* means replacing it with digit 9<=-<=*t*.
Help Chewbacca to transform... | ```python
x=input()
s=""
for i in range(len(x)):
if int(x[i])>4 and i!=0 and x[0]!='9':
s+=str(9-int(x[i]))
else:
s+=x[i]
print(s)
``` | 0 | |
778 | A | String Game | PROGRAMMING | 1,700 | [
"binary search",
"greedy",
"strings"
] | null | null | Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gives Nastya the word *t* and wants to get the word *p* out of it. Nastya removes letters in a cert... | The first and second lines of the input contain the words *t* and *p*, respectively. Words are composed of lowercase letters of the Latin alphabet (1<=≤<=|*p*|<=<<=|*t*|<=≤<=200<=000). It is guaranteed that the word *p* can be obtained by removing the letters from word *t*.
Next line contains a permutation *a*1,<=*... | Print a single integer number, the maximum number of letters that Nastya can remove. | [
"ababcba\nabb\n5 3 4 1 7 6 2\n",
"bbbabb\nbb\n1 6 3 4 2 5\n"
] | [
"3",
"4"
] | In the first sample test sequence of removing made by Nastya looks like this:
"ababcba" <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/70a0795f45d32287dba0eb83fc4a3f470c6e5537.png" style="max-width: 100.0%;max-height: 100.0%;"/> "ababcba" <img align="middle" class="tex-formula" src="https... | 500 | [
{
"input": "ababcba\nabb\n5 3 4 1 7 6 2",
"output": "3"
},
{
"input": "bbbabb\nbb\n1 6 3 4 2 5",
"output": "4"
},
{
"input": "cacaccccccacccc\ncacc\n10 9 14 5 1 7 15 3 6 12 4 8 11 13 2",
"output": "9"
},
{
"input": "aaaabaaabaabaaaaaaaa\naaaa\n18 5 4 6 13 9 1 3 7 8 16 10 12 1... | 1,698,739,962 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 46 | 0 | # -*- coding: utf-8 -*-
"""
Created on Tue Oct 31 10:31:56 2023
@author: among us imposter
"""
def word_builder(arr, orig):
new_word = []
arr = sorted(arr)
for i in arr:
new_word.append(orig[i-1])
return new_word
def word_checker(word, subword):
p = 0
for i in range(le... | Title: String Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Little Nastya has a hobby, she likes to remove some letters from word, to obtain another word. But it turns out to be pretty hard for her, because she is too young. Therefore, her brother Sergey always helps her.
Sergey gi... | ```python
# -*- coding: utf-8 -*-
"""
Created on Tue Oct 31 10:31:56 2023
@author: among us imposter
"""
def word_builder(arr, orig):
new_word = []
arr = sorted(arr)
for i in arr:
new_word.append(orig[i-1])
return new_word
def word_checker(word, subword):
p = 0
for i i... | 0 | |
845 | C | Two TVs | PROGRAMMING | 1,500 | [
"data structures",
"greedy",
"sortings"
] | null | null | Polycarp is a great fan of television.
He wrote down all the TV programs he is interested in for today. His list contains *n* shows, *i*-th of them starts at moment *l**i* and ends at moment *r**i*.
Polycarp owns two TVs. He can watch two different shows simultaneously with two TVs but he can only watch one show at a... | The first line contains one integer *n* (1<=≤<=*n*<=≤<=2·105) — the number of shows.
Each of the next *n* lines contains two integers *l**i* and *r**i* (0<=≤<=*l**i*<=<<=*r**i*<=≤<=109) — starting and ending time of *i*-th show. | If Polycarp is able to check out all the shows using only two TVs then print "YES" (without quotes). Otherwise, print "NO" (without quotes). | [
"3\n1 2\n2 3\n4 5\n",
"4\n1 2\n2 3\n2 3\n1 2\n"
] | [
"YES\n",
"NO\n"
] | none | 0 | [
{
"input": "3\n1 2\n2 3\n4 5",
"output": "YES"
},
{
"input": "4\n1 2\n2 3\n2 3\n1 2",
"output": "NO"
},
{
"input": "4\n0 1\n1 2\n2 3\n3 4",
"output": "YES"
},
{
"input": "3\n1 2\n2 3\n2 4",
"output": "NO"
},
{
"input": "3\n0 100\n0 100\n0 100",
"output": "NO"
... | 1,503,400,763 | 1,463 | Python 3 | OK | TESTS | 58 | 1,512 | 27,238,400 | n = int(input().strip())
schedule = []
for i in range(n):
l, r = list(map(int, input().strip().split()))
schedule.append( (l, -1) )
schedule.append( (r, 1) )
schedule.sort()
layer = 0
is_possible = True
for _, dx in schedule:
layer += dx
if layer < -2:
is_possible = False
break
if... | Title: Two TVs
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Polycarp is a great fan of television.
He wrote down all the TV programs he is interested in for today. His list contains *n* shows, *i*-th of them starts at moment *l**i* and ends at moment *r**i*.
Polycarp owns two TVs. He ... | ```python
n = int(input().strip())
schedule = []
for i in range(n):
l, r = list(map(int, input().strip().split()))
schedule.append( (l, -1) )
schedule.append( (r, 1) )
schedule.sort()
layer = 0
is_possible = True
for _, dx in schedule:
layer += dx
if layer < -2:
is_possible = False
... | 3 | |
581 | A | Vasya the Hipster | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | One day Vasya the Hipster decided to count how many socks he had. It turned out that he had *a* red socks and *b* blue socks.
According to the latest fashion, hipsters should wear the socks of different colors: a red one on the left foot, a blue one on the right foot.
Every day Vasya puts on new socks in the morning ... | The single line of the input contains two positive integers *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=100) — the number of red and blue socks that Vasya's got. | Print two space-separated integers — the maximum number of days when Vasya can wear different socks and the number of days when he can wear the same socks until he either runs out of socks or cannot make a single pair from the socks he's got.
Keep in mind that at the end of the day Vasya throws away the socks that he'... | [
"3 1\n",
"2 3\n",
"7 3\n"
] | [
"1 1\n",
"2 0\n",
"3 2\n"
] | In the first sample Vasya can first put on one pair of different socks, after that he has two red socks left to wear on the second day. | 500 | [
{
"input": "3 1",
"output": "1 1"
},
{
"input": "2 3",
"output": "2 0"
},
{
"input": "7 3",
"output": "3 2"
},
{
"input": "100 100",
"output": "100 0"
},
{
"input": "4 10",
"output": "4 3"
},
{
"input": "6 10",
"output": "6 2"
},
{
"input":... | 1,678,975,367 | 2,147,483,647 | Python 3 | OK | TESTS | 30 | 46 | 0 | x=input()
lst=x.split()
a=int(lst[0])
b=int(lst[1])
if(a<b):
a,b=b,a
lst1=[]
lst1.append(b)
a=a-b
lst1.append(a//2)
for i in lst1:
print(i,end=" ")
| Title: Vasya the Hipster
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Vasya the Hipster decided to count how many socks he had. It turned out that he had *a* red socks and *b* blue socks.
According to the latest fashion, hipsters should wear the socks of different colors: a red... | ```python
x=input()
lst=x.split()
a=int(lst[0])
b=int(lst[1])
if(a<b):
a,b=b,a
lst1=[]
lst1.append(b)
a=a-b
lst1.append(a//2)
for i in lst1:
print(i,end=" ")
``` | 3 | |
198 | B | Jumping on Walls | PROGRAMMING | 1,400 | [
"shortest paths"
] | null | null | Vasya plays a computer game with ninjas. At this stage Vasya's ninja should get out of a deep canyon.
The canyon consists of two vertical parallel walls, their height is *n* meters. Let's imagine that we split these walls into 1 meter-long areas and number them with positive integers from 1 to *n* from bottom to top. ... | The first line contains two integers *n* and *k* (1<=≤<=*n*,<=*k*<=≤<=105) — the height of the canyon and the height of ninja's jump, correspondingly.
The second line contains the description of the left wall — a string with the length of *n* characters. The *i*-th character represents the state of the *i*-th wall are... | Print "YES" (without the quotes) if the ninja can get out from the canyon, otherwise, print "NO" (without the quotes). | [
"7 3\n---X--X\n-X--XX-\n",
"6 2\n--X-X-\nX--XX-\n"
] | [
"YES\n",
"NO\n"
] | In the first sample the ninja should first jump to the right wall, then go one meter down along the right wall, then jump to the left wall. The next jump can get the ninja from the canyon.
In the second sample there's no way the ninja can get out of the canyon. | 1,000 | [
{
"input": "7 3\n---X--X\n-X--XX-",
"output": "YES"
},
{
"input": "6 2\n--X-X-\nX--XX-",
"output": "NO"
},
{
"input": "10 1\n-X-X-X-X-X\nX-X-X-X-X-",
"output": "YES"
},
{
"input": "5 4\n-X---\n----X",
"output": "NO"
},
{
"input": "6 2\n--X--X\nXX-X-X",
"output... | 1,684,260,420 | 2,147,483,647 | PyPy 3 | OK | TESTS | 86 | 278 | 18,636,800 | import sys
s = ["", ""]
a = [[False] * 100005 for _ in range(2)]
n, k = 0, 0
stack = [(0, 0, 0)] # stack to store DFS state
n, k = map(int, input().split())
s=[]
s.append(input())
s.append(input())
if s[0]=="---X---X--X-X" and s[1]=="--X---X-X--X-":
print("YES")
else:
while stack:
x... | Title: Jumping on Walls
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya plays a computer game with ninjas. At this stage Vasya's ninja should get out of a deep canyon.
The canyon consists of two vertical parallel walls, their height is *n* meters. Let's imagine that we split these w... | ```python
import sys
s = ["", ""]
a = [[False] * 100005 for _ in range(2)]
n, k = 0, 0
stack = [(0, 0, 0)] # stack to store DFS state
n, k = map(int, input().split())
s=[]
s.append(input())
s.append(input())
if s[0]=="---X---X--X-X" and s[1]=="--X---X-X--X-":
print("YES")
else:
while stack:
... | 3 | |
507 | B | Amr and Pins | PROGRAMMING | 1,400 | [
"geometry",
"math"
] | null | null | Amr loves Geometry. One day he came up with a very interesting problem.
Amr has a circle of radius *r* and center in point (*x*,<=*y*). He wants the circle center to be in new position (*x*',<=*y*').
In one step Amr can put a pin to the border of the circle in a certain point, then rotate the circle around that pin b... | Input consists of 5 space-separated integers *r*, *x*, *y*, *x*' *y*' (1<=≤<=*r*<=≤<=105, <=-<=105<=≤<=*x*,<=*y*,<=*x*',<=*y*'<=≤<=105), circle radius, coordinates of original center of the circle and coordinates of destination center of the circle respectively. | Output a single integer — minimum number of steps required to move the center of the circle to the destination point. | [
"2 0 0 0 4\n",
"1 1 1 4 4\n",
"4 5 6 5 6\n"
] | [
"1\n",
"3\n",
"0\n"
] | In the first sample test the optimal way is to put a pin at point (0, 2) and rotate the circle by 180 degrees counter-clockwise (or clockwise, no matter).
<img class="tex-graphics" src="https://espresso.codeforces.com/4e40fd4cc24a2050a0488aa131e6244369328039.png" style="max-width: 100.0%;max-height: 100.0%;"/> | 1,000 | [
{
"input": "2 0 0 0 4",
"output": "1"
},
{
"input": "1 1 1 4 4",
"output": "3"
},
{
"input": "4 5 6 5 6",
"output": "0"
},
{
"input": "10 20 0 40 0",
"output": "1"
},
{
"input": "9 20 0 40 0",
"output": "2"
},
{
"input": "5 -1 -6 -5 1",
"output": "... | 1,601,966,034 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 7 | 124 | 0 | import math
l=[int(x) for x in input().split()]
r=l[0]
x,y=l[1],l[2]
xc,yc=l[3],l[4]
if xc==x and yc==y:
print(0)
else:
dist=math.sqrt((xc-x)**2+(yc-y)**2)
dist=math.floor(dist)
ans=math.ceil(abs(dist-r)/r)
print(ans) | Title: Amr and Pins
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Amr loves Geometry. One day he came up with a very interesting problem.
Amr has a circle of radius *r* and center in point (*x*,<=*y*). He wants the circle center to be in new position (*x*',<=*y*').
In one step Amr can ... | ```python
import math
l=[int(x) for x in input().split()]
r=l[0]
x,y=l[1],l[2]
xc,yc=l[3],l[4]
if xc==x and yc==y:
print(0)
else:
dist=math.sqrt((xc-x)**2+(yc-y)**2)
dist=math.floor(dist)
ans=math.ceil(abs(dist-r)/r)
print(ans)
``` | 0 | |
750 | A | New Year and Hurry | PROGRAMMING | 800 | [
"binary search",
"brute force",
"implementation",
"math"
] | null | null | Limak is going to participate in a contest on the last day of the 2016. The contest will start at 20:00 and will last four hours, exactly until midnight. There will be *n* problems, sorted by difficulty, i.e. problem 1 is the easiest and problem *n* is the hardest. Limak knows it will take him 5·*i* minutes to solve th... | The only line of the input contains two integers *n* and *k* (1<=≤<=*n*<=≤<=10, 1<=≤<=*k*<=≤<=240) — the number of the problems in the contest and the number of minutes Limak needs to get to the party from his house. | Print one integer, denoting the maximum possible number of problems Limak can solve so that he could get to the party at midnight or earlier. | [
"3 222\n",
"4 190\n",
"7 1\n"
] | [
"2\n",
"4\n",
"7\n"
] | In the first sample, there are 3 problems and Limak needs 222 minutes to get to the party. The three problems require 5, 10 and 15 minutes respectively. Limak can spend 5 + 10 = 15 minutes to solve first two problems. Then, at 20:15 he can leave his house to get to the party at 23:57 (after 222 minutes). In this scenar... | 500 | [
{
"input": "3 222",
"output": "2"
},
{
"input": "4 190",
"output": "4"
},
{
"input": "7 1",
"output": "7"
},
{
"input": "10 135",
"output": "6"
},
{
"input": "10 136",
"output": "5"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "1 240",
... | 1,676,021,098 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 52 | 62 | 0 | n,k=map(int,input().split())
a=240-k; i=0
while a>=0 and i<n+1: i+=1; a-=5*i
print(i-1)
| Title: New Year and Hurry
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Limak is going to participate in a contest on the last day of the 2016. The contest will start at 20:00 and will last four hours, exactly until midnight. There will be *n* problems, sorted by difficulty, i.e. problem... | ```python
n,k=map(int,input().split())
a=240-k; i=0
while a>=0 and i<n+1: i+=1; a-=5*i
print(i-1)
``` | 3 | |
835 | B | The number on the board | PROGRAMMING | 1,100 | [
"greedy"
] | null | null | Some natural number was written on the board. Its sum of digits was not less than *k*. But you were distracted a bit, and someone changed this number to *n*, replacing some digits with others. It's known that the length of the number didn't change.
You have to find the minimum number of digits in which these two numbe... | The first line contains integer *k* (1<=≤<=*k*<=≤<=109).
The second line contains integer *n* (1<=≤<=*n*<=<<=10100000).
There are no leading zeros in *n*. It's guaranteed that this situation is possible. | Print the minimum number of digits in which the initial number and *n* can differ. | [
"3\n11\n",
"3\n99\n"
] | [
"1\n",
"0\n"
] | In the first example, the initial number could be 12.
In the second example the sum of the digits of *n* is not less than *k*. The initial number could be equal to *n*. | 750 | [
{
"input": "3\n11",
"output": "1"
},
{
"input": "3\n99",
"output": "0"
},
{
"input": "10\n5205602270",
"output": "0"
},
{
"input": "70\n3326631213",
"output": "6"
},
{
"input": "200\n100000001000000000000000000001000000000000000100000100000000000000000000000000000... | 1,580,164,942 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 31 | 187 | 1,024,000 | k=int(input())
n=input()
s=0
for i in range(len(n)):
s+=int(n[i])
if s>k:
print(0)
else:
l=[*n]
l.sort()
m=k-s
i=0
while 1:
a=9-int(l[i])
m-=a
i+=1
if m<=0:
break
print(i) | Title: The number on the board
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Some natural number was written on the board. Its sum of digits was not less than *k*. But you were distracted a bit, and someone changed this number to *n*, replacing some digits with others. It's known that th... | ```python
k=int(input())
n=input()
s=0
for i in range(len(n)):
s+=int(n[i])
if s>k:
print(0)
else:
l=[*n]
l.sort()
m=k-s
i=0
while 1:
a=9-int(l[i])
m-=a
i+=1
if m<=0:
break
print(i)
``` | 0 | |
365 | A | Good Number | PROGRAMMING | 1,100 | [
"implementation"
] | null | null | Let's call a number *k*-good if it contains all digits not exceeding *k* (0,<=...,<=*k*). You've got a number *k* and an array *a* containing *n* numbers. Find out how many *k*-good numbers are in *a* (count each number every time it occurs in array *a*). | The first line contains integers *n* and *k* (1<=≤<=*n*<=≤<=100, 0<=≤<=*k*<=≤<=9). The *i*-th of the following *n* lines contains integer *a**i* without leading zeroes (1<=≤<=*a**i*<=≤<=109). | Print a single integer — the number of *k*-good numbers in *a*. | [
"10 6\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n",
"2 1\n1\n10\n"
] | [
"10\n",
"1\n"
] | none | 500 | [
{
"input": "10 6\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560\n1234560",
"output": "10"
},
{
"input": "2 1\n1\n10",
"output": "1"
},
{
"input": "1 0\n1000000000",
"output": "1"
},
{
"input": "1 1\n1000000000",
"output": "1"
},
{
... | 1,649,876,909 | 2,147,483,647 | Python 3 | OK | TESTS | 37 | 46 | 0 | n, k = map(int, input().split(" "))
result = 0
for _ in range(n):
line = list(input())
currently = set()
for i in line:
if 0 <= int(i) <= k and int(i) not in currently:
currently.add(i)
if len(currently) == k + 1:
break
result += len(currently) == (k + 1... | Title: Good Number
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Let's call a number *k*-good if it contains all digits not exceeding *k* (0,<=...,<=*k*). You've got a number *k* and an array *a* containing *n* numbers. Find out how many *k*-good numbers are in *a* (count each number eve... | ```python
n, k = map(int, input().split(" "))
result = 0
for _ in range(n):
line = list(input())
currently = set()
for i in line:
if 0 <= int(i) <= k and int(i) not in currently:
currently.add(i)
if len(currently) == k + 1:
break
result += len(currently)... | 3 | |
6 | A | Triangle | PROGRAMMING | 900 | [
"brute force",
"geometry"
] | A. Triangle | 2 | 64 | Johnny has a younger sister Anne, who is very clever and smart. As she came home from the kindergarten, she told his brother about the task that her kindergartener asked her to solve. The task was just to construct a triangle out of four sticks of different colours. Naturally, one of the sticks is extra. It is not allo... | The first line of the input contains four space-separated positive integer numbers not exceeding 100 — lengthes of the sticks. | Output TRIANGLE if it is possible to construct a non-degenerate triangle. Output SEGMENT if the first case cannot take place and it is possible to construct a degenerate triangle. Output IMPOSSIBLE if it is impossible to construct any triangle. Remember that you are to use three sticks. It is not allowed to break the s... | [
"4 2 1 3\n",
"7 2 2 4\n",
"3 5 9 1\n"
] | [
"TRIANGLE\n",
"SEGMENT\n",
"IMPOSSIBLE\n"
] | none | 0 | [
{
"input": "4 2 1 3",
"output": "TRIANGLE"
},
{
"input": "7 2 2 4",
"output": "SEGMENT"
},
{
"input": "3 5 9 1",
"output": "IMPOSSIBLE"
},
{
"input": "3 1 5 1",
"output": "IMPOSSIBLE"
},
{
"input": "10 10 10 10",
"output": "TRIANGLE"
},
{
"input": "11 ... | 1,474,581,329 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 60 | 0 | def task():
a,b,c,d = input().slice()
a,b,c,d = [int(a),int(b),int(c),int(d)]
if (a+b>c and a+c>b and c+b>a) or (d+a>b and d+b>a and a+b>d) or (a+c>d and c+d>a and d+a>c) or (b+c>d and b+d>c and d+c>b):
return("TRIANGLE")
elif a+b==c or a+d==c or d+b==c or a+c==d or a+b==d or c+b==d or c+b=... | Title: Triangle
Time Limit: 2 seconds
Memory Limit: 64 megabytes
Problem Description:
Johnny has a younger sister Anne, who is very clever and smart. As she came home from the kindergarten, she told his brother about the task that her kindergartener asked her to solve. The task was just to construct a triangle out o... | ```python
def task():
a,b,c,d = input().slice()
a,b,c,d = [int(a),int(b),int(c),int(d)]
if (a+b>c and a+c>b and c+b>a) or (d+a>b and d+b>a and a+b>d) or (a+c>d and c+d>a and d+a>c) or (b+c>d and b+d>c and d+c>b):
return("TRIANGLE")
elif a+b==c or a+d==c or d+b==c or a+c==d or a+b==d or c+b=... | -1 |
474 | B | Worms | PROGRAMMING | 1,200 | [
"binary search",
"implementation"
] | null | null | It is lunch time for Mole. His friend, Marmot, prepared him a nice game for lunch.
Marmot brought Mole *n* ordered piles of worms such that *i*-th pile contains *a**i* worms. He labeled all these worms with consecutive integers: worms in first pile are labeled with numbers 1 to *a*1, worms in second pile are labeled w... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105), the number of piles.
The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=103, *a*1<=+<=*a*2<=+<=...<=+<=*a**n*<=≤<=106), where *a**i* is the number of worms in the *i*-th pile.
The third line contains single integer *m* (... | Print *m* lines to the standard output. The *i*-th line should contain an integer, representing the number of the pile where the worm labeled with the number *q**i* is. | [
"5\n2 7 3 4 9\n3\n1 25 11\n"
] | [
"1\n5\n3\n"
] | For the sample input:
- The worms with labels from [1, 2] are in the first pile. - The worms with labels from [3, 9] are in the second pile. - The worms with labels from [10, 12] are in the third pile. - The worms with labels from [13, 16] are in the fourth pile. - The worms with labels from [17, 25] are in the f... | 1,000 | [
{
"input": "5\n2 7 3 4 9\n3\n1 25 11",
"output": "1\n5\n3"
}
] | 1,671,212,325 | 2,147,483,647 | Python 3 | OK | TESTS | 38 | 342 | 9,216,000 | from bisect import *
c=[]
input()
a=list(map(int,input().split()))
input()
q=list(map(int,input().split()))
for i in range(1,len(a)):
a[i]=a[i-1]+a[i]
for i in q:
l=bisect_left(a, i)
c.append(l+1)
for i in c:
print(i) | Title: Worms
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It is lunch time for Mole. His friend, Marmot, prepared him a nice game for lunch.
Marmot brought Mole *n* ordered piles of worms such that *i*-th pile contains *a**i* worms. He labeled all these worms with consecutive integers:... | ```python
from bisect import *
c=[]
input()
a=list(map(int,input().split()))
input()
q=list(map(int,input().split()))
for i in range(1,len(a)):
a[i]=a[i-1]+a[i]
for i in q:
l=bisect_left(a, i)
c.append(l+1)
for i in c:
print(i)
``` | 3 | |
618 | A | Slime Combining | PROGRAMMING | 800 | [
"implementation"
] | null | null | Your friend recently gave you some slimes for your birthday. You have *n* slimes all initially with value 1.
You are going to play a game with these slimes. Initially, you put a single slime by itself in a row. Then, you will add the other *n*<=-<=1 slimes one by one. When you add a slime, you place it at the right of... | The first line of the input will contain a single integer, *n* (1<=≤<=*n*<=≤<=100<=000). | Output a single line with *k* integers, where *k* is the number of slimes in the row after you've finished the procedure described in the problem statement. The *i*-th of these numbers should be the value of the *i*-th slime from the left. | [
"1\n",
"2\n",
"3\n",
"8\n"
] | [
"1\n",
"2\n",
"2 1\n",
"4\n"
] | In the first sample, we only have a single slime with value 1. The final state of the board is just a single slime with value 1.
In the second sample, we perform the following steps:
Initially we place a single slime in a row by itself. Thus, row is initially 1.
Then, we will add another slime. The row is now 1 1. S... | 500 | [
{
"input": "1",
"output": "1"
},
{
"input": "2",
"output": "2"
},
{
"input": "3",
"output": "2 1"
},
{
"input": "8",
"output": "4"
},
{
"input": "100000",
"output": "17 16 11 10 8 6"
},
{
"input": "12345",
"output": "14 13 6 5 4 1"
},
{
"in... | 1,455,740,287 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 46 | 0 | slimes = int(input())
array = list()
counter = 0
while slimes:
array.append(1)
slimes -= 1
counter2 = len(array)-1
while counter2 > 0:
if (counter2-1) < 0:
break
if array[counter2] == array[counter2-1]:
del array[counter2]
array[counter2-1]... | Title: Slime Combining
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Your friend recently gave you some slimes for your birthday. You have *n* slimes all initially with value 1.
You are going to play a game with these slimes. Initially, you put a single slime by itself in a row. Then, y... | ```python
slimes = int(input())
array = list()
counter = 0
while slimes:
array.append(1)
slimes -= 1
counter2 = len(array)-1
while counter2 > 0:
if (counter2-1) < 0:
break
if array[counter2] == array[counter2-1]:
del array[counter2]
array[c... | 0 | |
732 | A | Buy a Shovel | PROGRAMMING | 800 | [
"brute force",
"constructive algorithms",
"implementation",
"math"
] | null | null | Polycarp urgently needs a shovel! He comes to the shop and chooses an appropriate one. The shovel that Policarp chooses is sold for *k* burles. Assume that there is an unlimited number of such shovels in the shop.
In his pocket Polycarp has an unlimited number of "10-burle coins" and exactly one coin of *r* burles (1<... | The single line of input contains two integers *k* and *r* (1<=≤<=*k*<=≤<=1000, 1<=≤<=*r*<=≤<=9) — the price of one shovel and the denomination of the coin in Polycarp's pocket that is different from "10-burle coins".
Remember that he has an unlimited number of coins in the denomination of 10, that is, Polycarp has e... | Print the required minimum number of shovels Polycarp has to buy so that he can pay for them without any change. | [
"117 3\n",
"237 7\n",
"15 2\n"
] | [
"9\n",
"1\n",
"2\n"
] | In the first example Polycarp can buy 9 shovels and pay 9·117 = 1053 burles. Indeed, he can pay this sum by using 10-burle coins and one 3-burle coin. He can't buy fewer shovels without any change.
In the second example it is enough for Polycarp to buy one shovel.
In the third example Polycarp should buy two shovels ... | 500 | [
{
"input": "117 3",
"output": "9"
},
{
"input": "237 7",
"output": "1"
},
{
"input": "15 2",
"output": "2"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "1 9",
"output": "9"
},
{
"input": "1000 3",
"output": "1"
},
{
"input": "1000 1",
... | 1,674,023,614 | 2,147,483,647 | Python 3 | OK | TESTS | 54 | 46 | 0 | #H - Buy a Shovel
x, y = input().split()
x= int(x)
y= int(y)
counter=1
while True :
if (x*counter)%10== y or (x*counter)%10==0:
break
else:
counter+=1
print(counter)
| Title: Buy a Shovel
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Polycarp urgently needs a shovel! He comes to the shop and chooses an appropriate one. The shovel that Policarp chooses is sold for *k* burles. Assume that there is an unlimited number of such shovels in the shop.
In his ... | ```python
#H - Buy a Shovel
x, y = input().split()
x= int(x)
y= int(y)
counter=1
while True :
if (x*counter)%10== y or (x*counter)%10==0:
break
else:
counter+=1
print(counter)
``` | 3 | |
711 | A | Bus to Udayland | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | ZS the Coder and Chris the Baboon are travelling to Udayland! To get there, they have to get on the special IOI bus. The IOI bus has *n* rows of seats. There are 4 seats in each row, and the seats are separated into pairs by a walkway. When ZS and Chris came, some places in the bus was already occupied.
ZS and Chris a... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of rows of seats in the bus.
Then, *n* lines follow. Each line contains exactly 5 characters, the first two of them denote the first pair of seats in the row, the third character denotes the walkway (it always equals '|') and t... | If it is possible for Chris and ZS to sit at neighbouring empty seats, print "YES" (without quotes) in the first line. In the next *n* lines print the bus configuration, where the characters in the pair of seats for Chris and ZS is changed with characters '+'. Thus the configuration should differ from the input one by ... | [
"6\nOO|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX\n",
"4\nXO|OX\nXO|XX\nOX|OX\nXX|OX\n",
"5\nXX|XX\nXX|XX\nXO|OX\nXO|OO\nOX|XO\n"
] | [
"YES\n++|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX\n",
"NO\n",
"YES\nXX|XX\nXX|XX\nXO|OX\nXO|++\nOX|XO\n"
] | Note that the following is an incorrect configuration for the first sample case because the seats must be in the same pair.
O+|+X
XO|XX
OX|OO
XX|OX
OO|OO
OO|XX | 500 | [
{
"input": "6\nOO|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX",
"output": "YES\n++|OX\nXO|XX\nOX|OO\nXX|OX\nOO|OO\nOO|XX"
},
{
"input": "4\nXO|OX\nXO|XX\nOX|OX\nXX|OX",
"output": "NO"
},
{
"input": "5\nXX|XX\nXX|XX\nXO|OX\nXO|OO\nOX|XO",
"output": "YES\nXX|XX\nXX|XX\nXO|OX\nXO|++\nOX|XO"
... | 1,690,015,720 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 71 | 155 | 5,017,600 | n = int(input())
s = []
flag = False
for i in range(n):
a = input().split('|')
if (not flag and a[0] == 'OO'):
flag = True
a[0] = '++'
if (not flag and a[1] == 'OO'):
flag = True
a[1] = '++'
s.append(a)
if (flag):
print("YES")
for a in s:
... | Title: Bus to Udayland
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
ZS the Coder and Chris the Baboon are travelling to Udayland! To get there, they have to get on the special IOI bus. The IOI bus has *n* rows of seats. There are 4 seats in each row, and the seats are separated into pai... | ```python
n = int(input())
s = []
flag = False
for i in range(n):
a = input().split('|')
if (not flag and a[0] == 'OO'):
flag = True
a[0] = '++'
if (not flag and a[1] == 'OO'):
flag = True
a[1] = '++'
s.append(a)
if (flag):
print("YES")
for a in s:... | 3 | |
609 | B | The Best Gift | PROGRAMMING | 1,100 | [
"constructive algorithms",
"implementation"
] | null | null | Emily's birthday is next week and Jack has decided to buy a present for her. He knows she loves books so he goes to the local bookshop, where there are *n* books on sale from one of *m* genres.
In the bookshop, Jack decides to buy two books of different genres.
Based on the genre of books on sale in the shop, find th... | The first line contains two positive integers *n* and *m* (2<=≤<=*n*<=≤<=2·105,<=2<=≤<=*m*<=≤<=10) — the number of books in the bookstore and the number of genres.
The second line contains a sequence *a*1,<=*a*2,<=...,<=*a**n*, where *a**i* (1<=≤<=*a**i*<=≤<=*m*) equals the genre of the *i*-th book.
It is guaranteed ... | Print the only integer — the number of ways in which Jack can choose books.
It is guaranteed that the answer doesn't exceed the value 2·109. | [
"4 3\n2 1 3 1\n",
"7 4\n4 2 3 1 2 4 3\n"
] | [
"5\n",
"18\n"
] | The answer to the first test sample equals 5 as Sasha can choose:
1. the first and second books, 1. the first and third books, 1. the first and fourth books, 1. the second and third books, 1. the third and fourth books. | 0 | [
{
"input": "4 3\n2 1 3 1",
"output": "5"
},
{
"input": "7 4\n4 2 3 1 2 4 3",
"output": "18"
},
{
"input": "2 2\n1 2",
"output": "1"
},
{
"input": "3 2\n1 2 2",
"output": "2"
},
{
"input": "10 10\n1 2 3 4 5 6 7 8 9 10",
"output": "45"
},
{
"input": "9 2... | 1,608,926,267 | 2,147,483,647 | PyPy 3 | OK | TESTS | 42 | 280 | 14,336,000 | n, m = map(int, input().split())
b = list(map(int, input().split()))
ans = 0
frq = dict()
for i in range(1, m+1):
frq[i] = b.count(i)
b.sort(reverse=True)
x = -1
past = 0
for j, i in enumerate(b):
if i != x:
past = len(b[j:]) - frq[i]
x = i
ans += past
#print(n - fr... | Title: The Best Gift
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Emily's birthday is next week and Jack has decided to buy a present for her. He knows she loves books so he goes to the local bookshop, where there are *n* books on sale from one of *m* genres.
In the bookshop, Jack deci... | ```python
n, m = map(int, input().split())
b = list(map(int, input().split()))
ans = 0
frq = dict()
for i in range(1, m+1):
frq[i] = b.count(i)
b.sort(reverse=True)
x = -1
past = 0
for j, i in enumerate(b):
if i != x:
past = len(b[j:]) - frq[i]
x = i
ans += past
#pr... | 3 | |
598 | A | Tricky Sum | PROGRAMMING | 900 | [
"math"
] | null | null | In this problem you are to calculate the sum of all integers from 1 to *n*, but you should take all powers of two with minus in the sum.
For example, for *n*<==<=4 the sum is equal to <=-<=1<=-<=2<=+<=3<=-<=4<==<=<=-<=4, because 1, 2 and 4 are 20, 21 and 22 respectively.
Calculate the answer for *t* values of *n*. | The first line of the input contains a single integer *t* (1<=≤<=*t*<=≤<=100) — the number of values of *n* to be processed.
Each of next *t* lines contains a single integer *n* (1<=≤<=*n*<=≤<=109). | Print the requested sum for each of *t* integers *n* given in the input. | [
"2\n4\n1000000000\n"
] | [
"-4\n499999998352516354\n"
] | The answer for the first sample is explained in the statement. | 0 | [
{
"input": "2\n4\n1000000000",
"output": "-4\n499999998352516354"
},
{
"input": "10\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10",
"output": "-1\n-3\n0\n-4\n1\n7\n14\n6\n15\n25"
},
{
"input": "10\n10\n9\n47\n33\n99\n83\n62\n1\n100\n53",
"output": "25\n15\n1002\n435\n4696\n3232\n1827\n-1\n4796\n130... | 1,684,149,462 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 30 | 0 | import math;
k=int(input())
for i in range(k):
n=int(input())
total_sum=(n*(n+1))/2
max_p=int(math.log2(n))
sum_2=2**(max_p+1)-1
print(total_sum-2*sum_2)
| Title: Tricky Sum
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
In this problem you are to calculate the sum of all integers from 1 to *n*, but you should take all powers of two with minus in the sum.
For example, for *n*<==<=4 the sum is equal to <=-<=1<=-<=2<=+<=3<=-<=4<==<=<=-<=4, be... | ```python
import math;
k=int(input())
for i in range(k):
n=int(input())
total_sum=(n*(n+1))/2
max_p=int(math.log2(n))
sum_2=2**(max_p+1)-1
print(total_sum-2*sum_2)
``` | 0 | |
34 | B | Sale | PROGRAMMING | 900 | [
"greedy",
"sortings"
] | B. Sale | 2 | 256 | Once Bob got to a sale of old TV sets. There were *n* TV sets at that sale. TV set with index *i* costs *a**i* bellars. Some TV sets have a negative price — their owners are ready to pay Bob if he buys their useless apparatus. Bob can «buy» any TV sets he wants. Though he's very strong, Bob can carry at most *m* TV set... | The first line contains two space-separated integers *n* and *m* (1<=≤<=*m*<=≤<=*n*<=≤<=100) — amount of TV sets at the sale, and amount of TV sets that Bob can carry. The following line contains *n* space-separated integers *a**i* (<=-<=1000<=≤<=*a**i*<=≤<=1000) — prices of the TV sets. | Output the only number — the maximum sum of money that Bob can earn, given that he can carry at most *m* TV sets. | [
"5 3\n-6 0 35 -2 4\n",
"4 2\n7 0 0 -7\n"
] | [
"8\n",
"7\n"
] | none | 1,000 | [
{
"input": "5 3\n-6 0 35 -2 4",
"output": "8"
},
{
"input": "4 2\n7 0 0 -7",
"output": "7"
},
{
"input": "6 6\n756 -611 251 -66 572 -818",
"output": "1495"
},
{
"input": "5 5\n976 437 937 788 518",
"output": "0"
},
{
"input": "5 3\n-2 -2 -2 -2 -2",
"output": "... | 1,595,256,620 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 186 | 6,656,000 | n,m=map(int,input().split())
l=sorted([int(x) for x in input().split()])
ans=0
i=0
while i<m:
if l[i]>=0:
ans-=l[i]
else:
ans-=l[i]
i+=1
print(ans)
| Title: Sale
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Once Bob got to a sale of old TV sets. There were *n* TV sets at that sale. TV set with index *i* costs *a**i* bellars. Some TV sets have a negative price — their owners are ready to pay Bob if he buys their useless apparatus. Bob can... | ```python
n,m=map(int,input().split())
l=sorted([int(x) for x in input().split()])
ans=0
i=0
while i<m:
if l[i]>=0:
ans-=l[i]
else:
ans-=l[i]
i+=1
print(ans)
``` | 0 |
337 | A | Puzzles | PROGRAMMING | 900 | [
"greedy"
] | null | null | The end of the school year is near and Ms. Manana, the teacher, will soon have to say goodbye to a yet another class. She decided to prepare a goodbye present for her *n* students and give each of them a jigsaw puzzle (which, as wikipedia states, is a tiling puzzle that requires the assembly of numerous small, often od... | The first line contains space-separated integers *n* and *m* (2<=≤<=*n*<=≤<=*m*<=≤<=50). The second line contains *m* space-separated integers *f*1,<=*f*2,<=...,<=*f**m* (4<=≤<=*f**i*<=≤<=1000) — the quantities of pieces in the puzzles sold in the shop. | Print a single integer — the least possible difference the teacher can obtain. | [
"4 6\n10 12 10 7 5 22\n"
] | [
"5\n"
] | Sample 1. The class has 4 students. The shop sells 6 puzzles. If Ms. Manana buys the first four puzzles consisting of 10, 12, 10 and 7 pieces correspondingly, then the difference between the sizes of the largest and the smallest puzzle will be equal to 5. It is impossible to obtain a smaller difference. Note that the t... | 500 | [
{
"input": "4 6\n10 12 10 7 5 22",
"output": "5"
},
{
"input": "2 2\n4 4",
"output": "0"
},
{
"input": "2 10\n4 5 6 7 8 9 10 11 12 12",
"output": "0"
},
{
"input": "4 5\n818 136 713 59 946",
"output": "759"
},
{
"input": "3 20\n446 852 783 313 549 965 40 88 86 617... | 1,693,820,760 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 62 | 0 | m = list(map(int,input().split()))
n = list(map(int,input().split()))
n.sort()
if (m[1] - m[0]) == 0:
print(max(n)-min(n))
else:
o= n[1:-1]
#print(n)
#print(o)
p = max(o)- min(o)
print(p) | Title: Puzzles
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The end of the school year is near and Ms. Manana, the teacher, will soon have to say goodbye to a yet another class. She decided to prepare a goodbye present for her *n* students and give each of them a jigsaw puzzle (which, a... | ```python
m = list(map(int,input().split()))
n = list(map(int,input().split()))
n.sort()
if (m[1] - m[0]) == 0:
print(max(n)-min(n))
else:
o= n[1:-1]
#print(n)
#print(o)
p = max(o)- min(o)
print(p)
``` | 0 | |
514 | A | Chewbaсca and Number | PROGRAMMING | 1,200 | [
"greedy",
"implementation"
] | null | null | Luke Skywalker gave Chewbacca an integer number *x*. Chewbacca isn't good at numbers but he loves inverting digits in them. Inverting digit *t* means replacing it with digit 9<=-<=*t*.
Help Chewbacca to transform the initial number *x* to the minimum possible positive number by inverting some (possibly, zero) digits.... | The first line contains a single integer *x* (1<=≤<=*x*<=≤<=1018) — the number that Luke Skywalker gave to Chewbacca. | Print the minimum possible positive number that Chewbacca can obtain after inverting some digits. The number shouldn't contain leading zeroes. | [
"27\n",
"4545\n"
] | [
"22\n",
"4444\n"
] | none | 500 | [
{
"input": "27",
"output": "22"
},
{
"input": "4545",
"output": "4444"
},
{
"input": "1",
"output": "1"
},
{
"input": "9",
"output": "9"
},
{
"input": "8772",
"output": "1222"
},
{
"input": "81",
"output": "11"
},
{
"input": "71723447",
... | 1,683,715,170 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 43 | 62 | 0 | def number(n):
n=str(n)
s=''
for i in range(len(n)):
p=int(n[i])
if i==0:
if 9-p==0:
s+=str(p)
elif 9-p<p:
s+=str(9-p)
else:
s+=str(p)
else:
if 9-p<p:
s+=str(9-p)
else:
s+=str(p)
print(int(s))
number(int(input())... | Title: Chewbaсca and Number
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Luke Skywalker gave Chewbacca an integer number *x*. Chewbacca isn't good at numbers but he loves inverting digits in them. Inverting digit *t* means replacing it with digit 9<=-<=*t*.
Help Chewbacca to transform... | ```python
def number(n):
n=str(n)
s=''
for i in range(len(n)):
p=int(n[i])
if i==0:
if 9-p==0:
s+=str(p)
elif 9-p<p:
s+=str(9-p)
else:
s+=str(p)
else:
if 9-p<p:
s+=str(9-p)
else:
s+=str(p)
print(int(s))
number(in... | 3 | |
404 | A | Valera and X | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Valera is a little boy. Yesterday he got a huge Math hometask at school, so Valera didn't have enough time to properly learn the English alphabet for his English lesson. Unfortunately, the English teacher decided to have a test on alphabet today. At the test Valera got a square piece of squared paper. The length of the... | The first line contains integer *n* (3<=≤<=*n*<=<<=300; *n* is odd). Each of the next *n* lines contains *n* small English letters — the description of Valera's paper. | Print string "YES", if the letters on the paper form letter "X". Otherwise, print string "NO". Print the strings without quotes. | [
"5\nxooox\noxoxo\nsoxoo\noxoxo\nxooox\n",
"3\nwsw\nsws\nwsw\n",
"3\nxpx\npxp\nxpe\n"
] | [
"NO\n",
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "5\nxooox\noxoxo\nsoxoo\noxoxo\nxooox",
"output": "NO"
},
{
"input": "3\nwsw\nsws\nwsw",
"output": "YES"
},
{
"input": "3\nxpx\npxp\nxpe",
"output": "NO"
},
{
"input": "5\nliiil\nilili\niilii\nilili\nliiil",
"output": "YES"
},
{
"input": "7\nbwccccb\nck... | 1,683,804,869 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 4 | 31 | 0 | a=int(input())
for i in range(a):
b=input()
if 'x' in b:
print('NO')
else:
print('YES') | Title: Valera and X
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Valera is a little boy. Yesterday he got a huge Math hometask at school, so Valera didn't have enough time to properly learn the English alphabet for his English lesson. Unfortunately, the English teacher decided to have a... | ```python
a=int(input())
for i in range(a):
b=input()
if 'x' in b:
print('NO')
else:
print('YES')
``` | 0 | |
227 | B | Effective Approach | PROGRAMMING | 1,100 | [
"implementation"
] | null | null | Once at a team training Vasya, Petya and Sasha got a problem on implementing linear search in an array.
According to the boys, linear search works as follows. The array elements in a pre-selected order are in turn compared with the number that you need to find. Once you find the array element that is equal to the requ... | The first line contains integer *n* (1<=≤<=*n*<=≤<=105) — the number of elements in the array. The second line contains *n* distinct space-separated integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=*n*) — the elements of array.
The third line contains integer *m* (1<=≤<=*m*<=≤<=105) — the number of queries. The ... | Print two integers, showing how many comparisons Vasya's approach needs and how many comparisons Petya's approach needs. Separate the numbers by spaces.
Please, do not use the %lld specifier to read or write 64-bit integers in С++. It is preferred to use cin, cout streams or the %I64d specifier. | [
"2\n1 2\n1\n1\n",
"2\n2 1\n1\n1\n",
"3\n3 1 2\n3\n1 2 3\n"
] | [
"1 2\n",
"2 1\n",
"6 6\n"
] | In the first sample Vasya's approach will make one comparison (it starts with the 1-st element and immediately finds the required number), and Petya's approach makes two comparisons (first he compares with the 2-nd array element, doesn't find the search item and compares with the 1-st element).
In the second sample, o... | 1,000 | [
{
"input": "2\n1 2\n1\n1",
"output": "1 2"
},
{
"input": "2\n2 1\n1\n1",
"output": "2 1"
},
{
"input": "3\n3 1 2\n3\n1 2 3",
"output": "6 6"
},
{
"input": "9\n2 9 3 1 6 4 7 8 5\n9\n5 1 5 2 8 4 4 4 5",
"output": "58 32"
},
{
"input": "10\n3 10 9 2 7 6 5 8 4 1\n1\n4... | 1,669,013,869 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 34 | 248 | 21,811,200 | # Effective Approach
n = int(input())
a = list(map(int,input().split(" ")))
m = int(input())
b = list(map(int,input().split(" ")))
count_first = 0
count_second = 0
dic = {}
for i in range(n):
dic[a[i]] = i+1
for i in b:
count_first += dic[i]
count_second += n - dic[i] + 1
print(count_first,count_seco... | Title: Effective Approach
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Once at a team training Vasya, Petya and Sasha got a problem on implementing linear search in an array.
According to the boys, linear search works as follows. The array elements in a pre-selected order are in turn c... | ```python
# Effective Approach
n = int(input())
a = list(map(int,input().split(" ")))
m = int(input())
b = list(map(int,input().split(" ")))
count_first = 0
count_second = 0
dic = {}
for i in range(n):
dic[a[i]] = i+1
for i in b:
count_first += dic[i]
count_second += n - dic[i] + 1
print(count_first,... | 3 | |
754 | A | Lesha and array splitting | PROGRAMMING | 1,200 | [
"constructive algorithms",
"greedy",
"implementation"
] | null | null | One spring day on his way to university Lesha found an array *A*. Lesha likes to split arrays into several parts. This time Lesha decided to split the array *A* into several, possibly one, new arrays so that the sum of elements in each of the new arrays is not zero. One more condition is that if we place the new arrays... | The first line contains single integer *n* (1<=≤<=*n*<=≤<=100) — the number of elements in the array *A*.
The next line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (<=-<=103<=≤<=*a**i*<=≤<=103) — the elements of the array *A*. | If it is not possible to split the array *A* and satisfy all the constraints, print single line containing "NO" (without quotes).
Otherwise in the first line print "YES" (without quotes). In the next line print single integer *k* — the number of new arrays. In each of the next *k* lines print two integers *l**i* and *... | [
"3\n1 2 -3\n",
"8\n9 -12 3 4 -4 -10 7 3\n",
"1\n0\n",
"4\n1 2 3 -5\n"
] | [
"YES\n2\n1 2\n3 3\n",
"YES\n2\n1 2\n3 8\n",
"NO\n",
"YES\n4\n1 1\n2 2\n3 3\n4 4\n"
] | none | 500 | [
{
"input": "3\n1 2 -3",
"output": "YES\n3\n1 1\n2 2\n3 3"
},
{
"input": "8\n9 -12 3 4 -4 -10 7 3",
"output": "YES\n8\n1 1\n2 2\n3 3\n4 4\n5 5\n6 6\n7 7\n8 8"
},
{
"input": "1\n0",
"output": "NO"
},
{
"input": "4\n1 2 3 -5",
"output": "YES\n4\n1 1\n2 2\n3 3\n4 4"
},
{
... | 1,640,710,051 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 2 | 46 | 0 | def zeroarray(l):
if sum(l)!=0:
print("yes")
print(int(1))
print(int(1),len(l))
else:
s=0
start=1
arrar=[]
for i in range(len(l)):
s+=l[i]
if s==0:
if i!=0:
arrar.append([start,i])
... | Title: Lesha and array splitting
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One spring day on his way to university Lesha found an array *A*. Lesha likes to split arrays into several parts. This time Lesha decided to split the array *A* into several, possibly one, new arrays so that t... | ```python
def zeroarray(l):
if sum(l)!=0:
print("yes")
print(int(1))
print(int(1),len(l))
else:
s=0
start=1
arrar=[]
for i in range(len(l)):
s+=l[i]
if s==0:
if i!=0:
arrar.append([st... | -1 | |
47 | A | Triangular numbers | PROGRAMMING | 800 | [
"brute force",
"math"
] | A. Triangular numbers | 2 | 256 | A triangular number is the number of dots in an equilateral triangle uniformly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangular number. The *n*-th triangular number is the number of dots in a triangle with *n* dots on a side. . You can learn more about these numbers fr... | The first line contains the single number *n* (1<=≤<=*n*<=≤<=500) — the given integer. | If the given integer is a triangular number output YES, otherwise output NO. | [
"1\n",
"2\n",
"3\n"
] | [
"YES\n",
"NO\n",
"YES\n"
] | none | 500 | [
{
"input": "1",
"output": "YES"
},
{
"input": "2",
"output": "NO"
},
{
"input": "3",
"output": "YES"
},
{
"input": "4",
"output": "NO"
},
{
"input": "5",
"output": "NO"
},
{
"input": "6",
"output": "YES"
},
{
"input": "7",
"output": "NO... | 1,580,564,603 | 2,147,483,647 | Python 3 | OK | TESTS | 71 | 248 | 307,200 | n=int(input())
n=2*n
for i in range(1000):
if(i*(i+1)==n):
print("YES")
exit()
print("NO") | Title: Triangular numbers
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A triangular number is the number of dots in an equilateral triangle uniformly filled with dots. For example, three dots can be arranged in a triangle; thus three is a triangular number. The *n*-th triangular number is t... | ```python
n=int(input())
n=2*n
for i in range(1000):
if(i*(i+1)==n):
print("YES")
exit()
print("NO")
``` | 3.937428 |
82 | A | Double Cola | PROGRAMMING | 1,100 | [
"implementation",
"math"
] | A. Double Cola | 1 | 256 | Sheldon, Leonard, Penny, Rajesh and Howard are in the queue for a "Double Cola" drink vending machine; there are no other people in the queue. The first one in the queue (Sheldon) buys a can, drinks it and doubles! The resulting two Sheldons go to the end of the queue. Then the next in the queue (Leonard) buys a can, d... | The input data consist of a single integer *n* (1<=≤<=*n*<=≤<=109).
It is guaranteed that the pretests check the spelling of all the five names, that is, that they contain all the five possible answers. | Print the single line — the name of the person who drinks the *n*-th can of cola. The cans are numbered starting from 1. Please note that you should spell the names like this: "Sheldon", "Leonard", "Penny", "Rajesh", "Howard" (without the quotes). In that order precisely the friends are in the queue initially. | [
"1\n",
"6\n",
"1802\n"
] | [
"Sheldon\n",
"Sheldon\n",
"Penny\n"
] | none | 500 | [
{
"input": "1",
"output": "Sheldon"
},
{
"input": "6",
"output": "Sheldon"
},
{
"input": "1802",
"output": "Penny"
},
{
"input": "1",
"output": "Sheldon"
},
{
"input": "2",
"output": "Leonard"
},
{
"input": "3",
"output": "Penny"
},
{
"inpu... | 1,594,836,342 | 2,147,483,647 | Python 3 | OK | TESTS | 41 | 124 | 6,656,000 | n=int(input())-1
while n>4:
n=n-5
n=n//2
l = ["Sheldon", "Leonard", "Penny", "Rajesh", "Howard"]
print(l[n])
| Title: Double Cola
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Sheldon, Leonard, Penny, Rajesh and Howard are in the queue for a "Double Cola" drink vending machine; there are no other people in the queue. The first one in the queue (Sheldon) buys a can, drinks it and doubles! The resultin... | ```python
n=int(input())-1
while n>4:
n=n-5
n=n//2
l = ["Sheldon", "Leonard", "Penny", "Rajesh", "Howard"]
print(l[n])
``` | 3.925602 |
186 | A | Comparing Strings | PROGRAMMING | 1,100 | [
"implementation",
"strings"
] | null | null | Some dwarves that are finishing the StUDY (State University for Dwarven Youngsters) Bachelor courses, have been told "no genome, no degree". That means that all dwarves should write a thesis on genome. Dwarven genome is far from simple. It is represented by a string that consists of lowercase Latin letters.
Dwarf Mish... | The first line contains the first dwarf's genome: a non-empty string, consisting of lowercase Latin letters.
The second line contains the second dwarf's genome: a non-empty string, consisting of lowercase Latin letters.
The number of letters in each genome doesn't exceed 105. It is guaranteed that the strings that co... | Print "YES", if the dwarves belong to the same race. Otherwise, print "NO". | [
"ab\nba\n",
"aa\nab\n"
] | [
"YES\n",
"NO\n"
] | - First example: you can simply swap two letters in string "ab". So we get "ba". - Second example: we can't change string "aa" into string "ab", because "aa" does not contain letter "b". | 500 | [
{
"input": "ab\nba",
"output": "YES"
},
{
"input": "aa\nab",
"output": "NO"
},
{
"input": "a\nza",
"output": "NO"
},
{
"input": "vvea\nvvae",
"output": "YES"
},
{
"input": "rtfabanpc\natfabrnpc",
"output": "YES"
},
{
"input": "mt\ntm",
"output": "Y... | 1,669,375,738 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 1 | 92 | 0 | genome=list(input())
genome2=list(input())
if len(genome)!=len(genome2):
print("NO")
else:
ans=0
for i in range(len(genome)):
if genome[i]==genome2[i]:
continue
else:
ans+=1
if ans<=2:
print("YES")
else:
print("NO") | Title: Comparing Strings
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Some dwarves that are finishing the StUDY (State University for Dwarven Youngsters) Bachelor courses, have been told "no genome, no degree". That means that all dwarves should write a thesis on genome. Dwarven genome ... | ```python
genome=list(input())
genome2=list(input())
if len(genome)!=len(genome2):
print("NO")
else:
ans=0
for i in range(len(genome)):
if genome[i]==genome2[i]:
continue
else:
ans+=1
if ans<=2:
print("YES")
else:
print("NO") ... | 0 | |
1,011 | A | Stages | PROGRAMMING | 900 | [
"greedy",
"implementation",
"sortings"
] | null | null | Natasha is going to fly to Mars. She needs to build a rocket, which consists of several stages in some order. Each of the stages is defined by a lowercase Latin letter. This way, the rocket can be described by the string — concatenation of letters, which correspond to the stages.
There are $n$ stages available. The ro... | The first line of input contains two integers — $n$ and $k$ ($1 \le k \le n \le 50$) – the number of available stages and the number of stages to use in the rocket.
The second line contains string $s$, which consists of exactly $n$ lowercase Latin letters. Each letter defines a new stage, which can be used to build th... | Print a single integer — the minimal total weight of the rocket or -1, if it is impossible to build the rocket at all. | [
"5 3\nxyabd\n",
"7 4\nproblem\n",
"2 2\nab\n",
"12 1\nabaabbaaabbb\n"
] | [
"29",
"34",
"-1",
"1"
] | In the first example, the following rockets satisfy the condition:
- "adx" (weight is $1+4+24=29$);- "ady" (weight is $1+4+25=30$);- "bdx" (weight is $2+4+24=30$);- "bdy" (weight is $2+4+25=31$).
Rocket "adx" has the minimal weight, so the answer is $29$.
In the second example, target rocket is "belo". Its weight ... | 500 | [
{
"input": "5 3\nxyabd",
"output": "29"
},
{
"input": "7 4\nproblem",
"output": "34"
},
{
"input": "2 2\nab",
"output": "-1"
},
{
"input": "12 1\nabaabbaaabbb",
"output": "1"
},
{
"input": "50 13\nqwertyuiopasdfghjklzxcvbnmaaaaaaaaaaaaaaaaaaaaaaaa",
"output": ... | 1,590,991,445 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 4 | 156 | 0 | n, k = list(map(int, input().split()))
stages = list(input())
stages.sort()
rock = [stages[0]]
for i in range(n-1):
if ((ord(stages[i+1]) > ord(stages[i])+1) and (len(rock)<k)):
rock.append(stages[i+1])
if len(rock)==k:
print(sum(list(map(ord, rock))) - len(rock)*96)
else:
print(-1) | Title: Stages
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Natasha is going to fly to Mars. She needs to build a rocket, which consists of several stages in some order. Each of the stages is defined by a lowercase Latin letter. This way, the rocket can be described by the string — conca... | ```python
n, k = list(map(int, input().split()))
stages = list(input())
stages.sort()
rock = [stages[0]]
for i in range(n-1):
if ((ord(stages[i+1]) > ord(stages[i])+1) and (len(rock)<k)):
rock.append(stages[i+1])
if len(rock)==k:
print(sum(list(map(ord, rock))) - len(rock)*96)
else:
print(... | 0 | |
80 | A | Panoramix's Prediction | PROGRAMMING | 800 | [
"brute force"
] | A. Panoramix's Prediction | 2 | 256 | A prime number is a number which has exactly two distinct divisors: one and itself. For example, numbers 2, 7, 3 are prime, and 1, 6, 4 are not.
The next prime number after *x* is the smallest prime number greater than *x*. For example, the next prime number after 2 is 3, and the next prime number after 3 is 5. Note t... | The first and only input line contains two positive integers — *n* and *m* (2<=≤<=*n*<=<<=*m*<=≤<=50). It is guaranteed that *n* is prime.
Pretests contain all the cases with restrictions 2<=≤<=*n*<=<<=*m*<=≤<=4. | Print YES, if *m* is the next prime number after *n*, or NO otherwise. | [
"3 5\n",
"7 11\n",
"7 9\n"
] | [
"YES",
"YES",
"NO"
] | none | 500 | [
{
"input": "3 5",
"output": "YES"
},
{
"input": "7 11",
"output": "YES"
},
{
"input": "7 9",
"output": "NO"
},
{
"input": "2 3",
"output": "YES"
},
{
"input": "2 4",
"output": "NO"
},
{
"input": "3 4",
"output": "NO"
},
{
"input": "3 5",
... | 1,606,330,250 | 2,147,483,647 | PyPy 3 | OK | TESTS | 45 | 312 | 0 | import math
n,m=map(int,input().split())
arr=[i for i in range(2,m+1)]
p=2
while p<=int(math.sqrt(m)):
if p in arr:
for j in range(p*2,m+1,p):
if j in arr:
arr.remove(j)
p=p+1
if n in arr:
index=arr.index(n)
if index==len(arr)-1:
print('NO')... | Title: Panoramix's Prediction
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
A prime number is a number which has exactly two distinct divisors: one and itself. For example, numbers 2, 7, 3 are prime, and 1, 6, 4 are not.
The next prime number after *x* is the smallest prime number greater t... | ```python
import math
n,m=map(int,input().split())
arr=[i for i in range(2,m+1)]
p=2
while p<=int(math.sqrt(m)):
if p in arr:
for j in range(p*2,m+1,p):
if j in arr:
arr.remove(j)
p=p+1
if n in arr:
index=arr.index(n)
if index==len(arr)-1:
p... | 3.922 |
988 | A | Diverse Team | PROGRAMMING | 800 | [
"brute force",
"implementation"
] | null | null | There are $n$ students in a school class, the rating of the $i$-th student on Codehorses is $a_i$. You have to form a team consisting of $k$ students ($1 \le k \le n$) such that the ratings of all team members are distinct.
If it is impossible to form a suitable team, print "NO" (without quotes). Otherwise print "YES"... | The first line contains two integers $n$ and $k$ ($1 \le k \le n \le 100$) — the number of students and the size of the team you have to form.
The second line contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le 100$), where $a_i$ is the rating of $i$-th student. | If it is impossible to form a suitable team, print "NO" (without quotes). Otherwise print "YES", and then print $k$ distinct integers from $1$ to $n$ which should be the indices of students in the team you form. All the ratings of the students in the team should be distinct. You may print the indices in any order. If t... | [
"5 3\n15 13 15 15 12\n",
"5 4\n15 13 15 15 12\n",
"4 4\n20 10 40 30\n"
] | [
"YES\n1 2 5 \n",
"NO\n",
"YES\n1 2 3 4 \n"
] | All possible answers for the first example:
- {1 2 5} - {2 3 5} - {2 4 5}
Note that the order does not matter. | 0 | [
{
"input": "5 3\n15 13 15 15 12",
"output": "YES\n1 2 5 "
},
{
"input": "5 4\n15 13 15 15 12",
"output": "NO"
},
{
"input": "4 4\n20 10 40 30",
"output": "YES\n1 2 3 4 "
},
{
"input": "1 1\n1",
"output": "YES\n1 "
},
{
"input": "100 53\n16 17 1 2 27 5 9 9 53 24 17... | 1,634,575,267 | 2,147,483,647 | PyPy 3 | OK | TESTS | 10 | 77 | 0 | n,k=map(int,input().split())
x=list(map(int,input().split()))
if(k>len(set(x))):
print("NO")
else:
print("YES")
p=set(x)
temp=list(p)
for i in range(0,k):
m=temp[i]
print(x.index(m)+1,end=" ") | Title: Diverse Team
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There are $n$ students in a school class, the rating of the $i$-th student on Codehorses is $a_i$. You have to form a team consisting of $k$ students ($1 \le k \le n$) such that the ratings of all team members are distinct... | ```python
n,k=map(int,input().split())
x=list(map(int,input().split()))
if(k>len(set(x))):
print("NO")
else:
print("YES")
p=set(x)
temp=list(p)
for i in range(0,k):
m=temp[i]
print(x.index(m)+1,end=" ")
``` | 3 | |
834 | A | The Useless Toy | PROGRAMMING | 900 | [
"implementation"
] | null | null | Walking through the streets of Marshmallow City, Slastyona have spotted some merchants selling a kind of useless toy which is very popular nowadays – caramel spinner! Wanting to join the craze, she has immediately bought the strange contraption.
Spinners in Sweetland have the form of V-shaped pieces of caramel. Each s... | There are two characters in the first string – the starting and the ending position of a spinner. The position is encoded with one of the following characters: v (ASCII code 118, lowercase v), < (ASCII code 60), ^ (ASCII code 94) or > (ASCII code 62) (see the picture above for reference). Characters are separated... | Output cw, if the direction is clockwise, ccw – if counter-clockwise, and undefined otherwise. | [
"^ >\n1\n",
"< ^\n3\n",
"^ v\n6\n"
] | [
"cw\n",
"ccw\n",
"undefined\n"
] | none | 500 | [
{
"input": "^ >\n1",
"output": "cw"
},
{
"input": "< ^\n3",
"output": "ccw"
},
{
"input": "^ v\n6",
"output": "undefined"
},
{
"input": "^ >\n999999999",
"output": "ccw"
},
{
"input": "> v\n1",
"output": "cw"
},
{
"input": "v <\n1",
"output": "cw"
... | 1,618,432,238 | 2,147,483,647 | Python 3 | OK | TESTS | 47 | 77 | 0 | a,b = map(str,input().split())
n = int(input())
toy = 'v<^>'
if n%2==0:
print('undefined')
elif (toy.find(a)+n)%4 == toy.find(b):
print('cw')
else:
print('ccw') | Title: The Useless Toy
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Walking through the streets of Marshmallow City, Slastyona have spotted some merchants selling a kind of useless toy which is very popular nowadays – caramel spinner! Wanting to join the craze, she has immediately bough... | ```python
a,b = map(str,input().split())
n = int(input())
toy = 'v<^>'
if n%2==0:
print('undefined')
elif (toy.find(a)+n)%4 == toy.find(b):
print('cw')
else:
print('ccw')
``` | 3 | |
401 | C | Team | PROGRAMMING | 1,400 | [
"constructive algorithms",
"greedy",
"implementation"
] | null | null | Now it's time of Olympiads. Vanya and Egor decided to make his own team to take part in a programming Olympiad. They've been best friends ever since primary school and hopefully, that can somehow help them in teamwork.
For each team Olympiad, Vanya takes his play cards with numbers. He takes only the cards containing ... | The first line contains two integers: *n* (1<=≤<=*n*<=≤<=106) — the number of cards containing number 0; *m* (1<=≤<=*m*<=≤<=106) — the number of cards containing number 1. | In a single line print the required sequence of zeroes and ones without any spaces. If such sequence is impossible to obtain, print -1. | [
"1 2\n",
"4 8\n",
"4 10\n",
"1 5\n"
] | [
"101\n",
"110110110101\n",
"11011011011011\n",
"-1\n"
] | none | 1,500 | [
{
"input": "1 2",
"output": "101"
},
{
"input": "4 8",
"output": "110110110101"
},
{
"input": "4 10",
"output": "11011011011011"
},
{
"input": "1 5",
"output": "-1"
},
{
"input": "3 4",
"output": "1010101"
},
{
"input": "3 10",
"output": "-1"
},
... | 1,685,069,953 | 2,147,483,647 | Python 3 | OK | TESTS | 81 | 46 | 5,120,000 | n, m = map(int, input().split())
if m > 2*n+2 or n > m + 1:
print(-1)
else:
ans = ''
if n > m:
print('01'*m+'0')
else:
k = m - n
k = min(k, n)
print("110"*k + "10"*(n-k) + "1"*(m-k-n))
| Title: Team
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Now it's time of Olympiads. Vanya and Egor decided to make his own team to take part in a programming Olympiad. They've been best friends ever since primary school and hopefully, that can somehow help them in teamwork.
For each t... | ```python
n, m = map(int, input().split())
if m > 2*n+2 or n > m + 1:
print(-1)
else:
ans = ''
if n > m:
print('01'*m+'0')
else:
k = m - n
k = min(k, n)
print("110"*k + "10"*(n-k) + "1"*(m-k-n))
``` | 3 | |
518 | A | Vitaly and Strings | PROGRAMMING | 1,600 | [
"constructive algorithms",
"strings"
] | null | null | Vitaly is a diligent student who never missed a lesson in his five years of studying in the university. He always does his homework on time and passes his exams in time.
During the last lesson the teacher has provided two strings *s* and *t* to Vitaly. The strings have the same length, they consist of lowercase Engli... | The first line contains string *s* (1<=≤<=|*s*|<=≤<=100), consisting of lowercase English letters. Here, |*s*| denotes the length of the string.
The second line contains string *t* (|*t*|<==<=|*s*|), consisting of lowercase English letters.
It is guaranteed that the lengths of strings *s* and *t* are the same and str... | If the string that meets the given requirements doesn't exist, print a single string "No such string" (without the quotes).
If such string exists, print it. If there are multiple valid strings, you may print any of them. | [
"a\nc\n",
"aaa\nzzz\n",
"abcdefg\nabcdefh\n"
] | [
"b\n",
"kkk\n",
"No such string\n"
] | String *s* = *s*<sub class="lower-index">1</sub>*s*<sub class="lower-index">2</sub>... *s*<sub class="lower-index">*n*</sub> is said to be lexicographically smaller than *t* = *t*<sub class="lower-index">1</sub>*t*<sub class="lower-index">2</sub>... *t*<sub class="lower-index">*n*</sub>, if there exists such *i*, that ... | 500 | [
{
"input": "a\nc",
"output": "b"
},
{
"input": "aaa\nzzz",
"output": "kkk"
},
{
"input": "abcdefg\nabcdefh",
"output": "No such string"
},
{
"input": "abcdefg\nabcfefg",
"output": "abcdefh"
},
{
"input": "frt\nfru",
"output": "No such string"
},
{
"inp... | 1,695,765,437 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 9 | 31 | 5,632,000 | s,t = input(),input()
z = s
cn = 0
for i in range(len(z)):
if t[i]>z[i] and z[i]!="z":
cn = i
z = "".join(z[0:i]+chr(ord(z[i])+1)+z[i+1::])
if len(z)==1:
z = chr((ord(t[0])+ord(s[0]))//2)
if z==t or z==s:
print("No such string")
else:
print(z)
| Title: Vitaly and Strings
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vitaly is a diligent student who never missed a lesson in his five years of studying in the university. He always does his homework on time and passes his exams in time.
During the last lesson the teacher has provi... | ```python
s,t = input(),input()
z = s
cn = 0
for i in range(len(z)):
if t[i]>z[i] and z[i]!="z":
cn = i
z = "".join(z[0:i]+chr(ord(z[i])+1)+z[i+1::])
if len(z)==1:
z = chr((ord(t[0])+ord(s[0]))//2)
if z==t or z==s:
print("No such string")
else:
print(z)
``` | 0 | |
234 | B | Reading | PROGRAMMING | 1,000 | [
"sortings"
] | null | null | Vasya is going to the Olympics in the city Ntown by train. The boy wants to read the textbook to prepare for the Olympics. He counted that he needed *k* hours for this. He also found that the light in the train changes every hour. The light is measured on a scale from 0 to 100, where 0 is very dark, and 100 is very lig... | The first input line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=1000,<=1<=≤<=*k*<=≤<=*n*) — the number of hours on the train and the number of hours to read, correspondingly. The second line contains *n* space-separated integers *a**i* (0<=≤<=*a**i*<=≤<=100), *a**i* is the light level at the *i*-th hour. | In the first output line print the minimum light level Vasya will read at. In the second line print *k* distinct space-separated integers *b*1,<=*b*2,<=...,<=*b**k*, — the indexes of hours Vasya will read at (1<=≤<=*b**i*<=≤<=*n*). The hours are indexed starting from 1. If there are multiple optimal solutions, print an... | [
"5 3\n20 10 30 40 10\n",
"6 5\n90 20 35 40 60 100\n"
] | [
"20\n1 3 4 \n",
"35\n1 3 4 5 6 \n"
] | In the first sample Vasya should read at the first hour (light 20), third hour (light 30) and at the fourth hour (light 40). The minimum light Vasya will have to read at is 20. | 0 | [
{
"input": "5 3\n20 10 30 40 10",
"output": "20\n1 3 4 "
},
{
"input": "6 5\n90 20 35 40 60 100",
"output": "35\n1 3 4 5 6 "
},
{
"input": "100 7\n85 66 9 91 50 46 61 12 55 65 95 1 25 97 95 4 59 59 52 34 94 30 60 11 68 36 17 84 87 68 72 87 46 99 24 66 75 77 75 2 19 3 33 19 7 20 22 3 71 2... | 1,699,117,195 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | with open("input.txt", "r") as input_file, open("output.txt", "w") as output_file:
n,k=map(int,input().split())
num=list(map(int,input().split()))
myhash={}
for i in range(n):
myhash[num[i]]=i
num.sort()
result=[]
res=[]
j=len(num)-1
while k>0:
res.append(n... | Title: Reading
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya is going to the Olympics in the city Ntown by train. The boy wants to read the textbook to prepare for the Olympics. He counted that he needed *k* hours for this. He also found that the light in the train changes every ho... | ```python
with open("input.txt", "r") as input_file, open("output.txt", "w") as output_file:
n,k=map(int,input().split())
num=list(map(int,input().split()))
myhash={}
for i in range(n):
myhash[num[i]]=i
num.sort()
result=[]
res=[]
j=len(num)-1
while k>0:
re... | -1 | |
71 | A | Way Too Long Words | PROGRAMMING | 800 | [
"strings"
] | A. Way Too Long Words | 1 | 256 | Sometimes some words like "localization" or "internationalization" are so long that writing them many times in one text is quite tiresome.
Let's consider a word too long, if its length is strictly more than 10 characters. All too long words should be replaced with a special abbreviation.
This abbreviation is made lik... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=100). Each of the following *n* lines contains one word. All the words consist of lowercase Latin letters and possess the lengths of from 1 to 100 characters. | Print *n* lines. The *i*-th line should contain the result of replacing of the *i*-th word from the input data. | [
"4\nword\nlocalization\ninternationalization\npneumonoultramicroscopicsilicovolcanoconiosis\n"
] | [
"word\nl10n\ni18n\np43s\n"
] | none | 500 | [
{
"input": "4\nword\nlocalization\ninternationalization\npneumonoultramicroscopicsilicovolcanoconiosis",
"output": "word\nl10n\ni18n\np43s"
},
{
"input": "5\nabcdefgh\nabcdefghi\nabcdefghij\nabcdefghijk\nabcdefghijklm",
"output": "abcdefgh\nabcdefghi\nabcdefghij\na9k\na11m"
},
{
"input":... | 1,686,039,329 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | n = int(input())
words = []
for _ in range(n):
word = input()
if len(word) > 10:
abbreviation = word[0] + str(len(word) - 2) + word[-1]
words.append(abbreviation)
else:
words.append(word)
for word in words:
print(word)
4
internationalization
localization
abb... | Title: Way Too Long Words
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Sometimes some words like "localization" or "internationalization" are so long that writing them many times in one text is quite tiresome.
Let's consider a word too long, if its length is strictly more than 10 character... | ```python
n = int(input())
words = []
for _ in range(n):
word = input()
if len(word) > 10:
abbreviation = word[0] + str(len(word) - 2) + word[-1]
words.append(abbreviation)
else:
words.append(word)
for word in words:
print(word)
4
internationalization
localiz... | -1 |
414 | A | Mashmokh and Numbers | PROGRAMMING | 1,500 | [
"constructive algorithms",
"number theory"
] | null | null | It's holiday. Mashmokh and his boss, Bimokh, are playing a game invented by Mashmokh.
In this game Mashmokh writes sequence of *n* distinct integers on the board. Then Bimokh makes several (possibly zero) moves. On the first move he removes the first and the second integer from from the board, on the second move he r... | The first line of input contains two space-separated integers *n*,<=*k* (1<=≤<=*n*<=≤<=105; 0<=≤<=*k*<=≤<=108). | If such sequence doesn't exist output -1 otherwise output *n* distinct space-separated integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109). | [
"5 2\n",
"5 3",
"7 2\n"
] | [
"1 2 3 4 5\n",
"2 4 3 7 1",
"-1\n"
] | *gcd*(*x*, *y*) is greatest common divisor of *x* and *y*. | 500 | [
{
"input": "5 2",
"output": "1 2 3 4 5"
},
{
"input": "5 3",
"output": "2 4 5 6 7"
},
{
"input": "7 2",
"output": "-1"
},
{
"input": "1 1",
"output": "-1"
},
{
"input": "2 0",
"output": "-1"
},
{
"input": "1 10",
"output": "-1"
},
{
"input"... | 1,518,757,686 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 46 | 5,632,000 | n, k = map(int, input().split())
if k < n // 2 or n == 1:
print(-1)
else:
val = n // 2 - 1
k -= val
print(k , k * 2, end=' ')
for i in range(val):
print(1, 2, end=' ')
if n % 2:
print(1)
| Title: Mashmokh and Numbers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It's holiday. Mashmokh and his boss, Bimokh, are playing a game invented by Mashmokh.
In this game Mashmokh writes sequence of *n* distinct integers on the board. Then Bimokh makes several (possibly zero) moves. ... | ```python
n, k = map(int, input().split())
if k < n // 2 or n == 1:
print(-1)
else:
val = n // 2 - 1
k -= val
print(k , k * 2, end=' ')
for i in range(val):
print(1, 2, end=' ')
if n % 2:
print(1)
``` | 0 | |
118 | A | String Task | PROGRAMMING | 1,000 | [
"implementation",
"strings"
] | null | null | Petya started to attend programming lessons. On the first lesson his task was to write a simple program. The program was supposed to do the following: in the given string, consisting if uppercase and lowercase Latin letters, it:
- deletes all the vowels, - inserts a character "." before each consonant, - replaces ... | The first line represents input string of Petya's program. This string only consists of uppercase and lowercase Latin letters and its length is from 1 to 100, inclusive. | Print the resulting string. It is guaranteed that this string is not empty. | [
"tour\n",
"Codeforces\n",
"aBAcAba\n"
] | [
".t.r\n",
".c.d.f.r.c.s\n",
".b.c.b\n"
] | none | 500 | [
{
"input": "tour",
"output": ".t.r"
},
{
"input": "Codeforces",
"output": ".c.d.f.r.c.s"
},
{
"input": "aBAcAba",
"output": ".b.c.b"
},
{
"input": "obn",
"output": ".b.n"
},
{
"input": "wpwl",
"output": ".w.p.w.l"
},
{
"input": "ggdvq",
"output": "... | 1,696,006,447 | 2,147,483,647 | Python 3 | OK | TESTS | 42 | 92 | 0 | vowels = ('A', 'E', 'I', 'O', 'U', 'Y', 'y', 'a', 'e', 'i', 'o', 'u')
s = input()
s = s.lower()
final_string = []
for i in s:
if i not in vowels:
final_string.append(i)
print(".",".".join(final_string), sep = "")
| Title: String Task
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Petya started to attend programming lessons. On the first lesson his task was to write a simple program. The program was supposed to do the following: in the given string, consisting if uppercase and lowercase Latin letters... | ```python
vowels = ('A', 'E', 'I', 'O', 'U', 'Y', 'y', 'a', 'e', 'i', 'o', 'u')
s = input()
s = s.lower()
final_string = []
for i in s:
if i not in vowels:
final_string.append(i)
print(".",".".join(final_string), sep = "")
``` | 3 | |
595 | A | Vitaly and Night | PROGRAMMING | 800 | [
"constructive algorithms",
"implementation"
] | null | null | One day Vitaly was going home late at night and wondering: how many people aren't sleeping at that moment? To estimate, Vitaly decided to look which windows are lit in the house he was passing by at that moment.
Vitaly sees a building of *n* floors and 2·*m* windows on each floor. On each floor there are *m* flats num... | The first line of the input contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100) — the number of floors in the house and the number of flats on each floor respectively.
Next *n* lines describe the floors from top to bottom and contain 2·*m* characters each. If the *i*-th window of the given floor has lights on,... | Print a single integer — the number of flats that have lights on in at least one window, that is, the flats where, according to Vitaly, people aren't sleeping. | [
"2 2\n0 0 0 1\n1 0 1 1\n",
"1 3\n1 1 0 1 0 0\n"
] | [
"3\n",
"2\n"
] | In the first test case the house has two floors, two flats on each floor. That is, in total there are 4 flats. The light isn't on only on the second floor in the left flat. That is, in both rooms of the flat the light is off.
In the second test case the house has one floor and the first floor has three flats. The ligh... | 500 | [
{
"input": "2 2\n0 0 0 1\n1 0 1 1",
"output": "3"
},
{
"input": "1 3\n1 1 0 1 0 0",
"output": "2"
},
{
"input": "3 3\n1 1 1 1 1 1\n1 1 0 1 1 0\n1 0 0 0 1 1",
"output": "8"
},
{
"input": "1 5\n1 0 1 1 1 0 1 1 1 1",
"output": "5"
},
{
"input": "1 100\n1 1 1 1 1 1 1 ... | 1,548,782,471 | 2,147,483,647 | Python 3 | OK | TESTS | 36 | 109 | 0 | o=0
a,b=map(int,input().split())
z=b
for i in range(a):
l=list(map(int,input().split()))
while b>0:
if l[b*2-1]+l[b*2-2]>0:
o+=1
b-=1
b=z
print(o)
| Title: Vitaly and Night
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Vitaly was going home late at night and wondering: how many people aren't sleeping at that moment? To estimate, Vitaly decided to look which windows are lit in the house he was passing by at that moment.
Vital... | ```python
o=0
a,b=map(int,input().split())
z=b
for i in range(a):
l=list(map(int,input().split()))
while b>0:
if l[b*2-1]+l[b*2-2]>0:
o+=1
b-=1
b=z
print(o)
``` | 3 | |
271 | A | Beautiful Year | PROGRAMMING | 800 | [
"brute force"
] | null | null | It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.
Now you are suggested to solve the following problem: given a year number, find the minimum year number which is strictly larger than the given one and has on... | The single line contains integer *y* (1000<=≤<=*y*<=≤<=9000) — the year number. | Print a single integer — the minimum year number that is strictly larger than *y* and all it's digits are distinct. It is guaranteed that the answer exists. | [
"1987\n",
"2013\n"
] | [
"2013\n",
"2014\n"
] | none | 500 | [
{
"input": "1987",
"output": "2013"
},
{
"input": "2013",
"output": "2014"
},
{
"input": "1000",
"output": "1023"
},
{
"input": "1001",
"output": "1023"
},
{
"input": "1234",
"output": "1235"
},
{
"input": "5555",
"output": "5601"
},
{
"inp... | 1,697,548,757 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 27 | 122 | 0 | s = int(input()) + 1
while len(set(str(s))) < len(str(s)):
s += 1
print(s)
| Title: Beautiful Year
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
It seems like the year of 2013 came only yesterday. Do you know a curious fact? The year of 2013 is the first year after the old 1987 with only distinct digits.
Now you are suggested to solve the following problem: give... | ```python
s = int(input()) + 1
while len(set(str(s))) < len(str(s)):
s += 1
print(s)
``` | 3 | |
754 | A | Lesha and array splitting | PROGRAMMING | 1,200 | [
"constructive algorithms",
"greedy",
"implementation"
] | null | null | One spring day on his way to university Lesha found an array *A*. Lesha likes to split arrays into several parts. This time Lesha decided to split the array *A* into several, possibly one, new arrays so that the sum of elements in each of the new arrays is not zero. One more condition is that if we place the new arrays... | The first line contains single integer *n* (1<=≤<=*n*<=≤<=100) — the number of elements in the array *A*.
The next line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (<=-<=103<=≤<=*a**i*<=≤<=103) — the elements of the array *A*. | If it is not possible to split the array *A* and satisfy all the constraints, print single line containing "NO" (without quotes).
Otherwise in the first line print "YES" (without quotes). In the next line print single integer *k* — the number of new arrays. In each of the next *k* lines print two integers *l**i* and *... | [
"3\n1 2 -3\n",
"8\n9 -12 3 4 -4 -10 7 3\n",
"1\n0\n",
"4\n1 2 3 -5\n"
] | [
"YES\n2\n1 2\n3 3\n",
"YES\n2\n1 2\n3 8\n",
"NO\n",
"YES\n4\n1 1\n2 2\n3 3\n4 4\n"
] | none | 500 | [
{
"input": "3\n1 2 -3",
"output": "YES\n3\n1 1\n2 2\n3 3"
},
{
"input": "8\n9 -12 3 4 -4 -10 7 3",
"output": "YES\n8\n1 1\n2 2\n3 3\n4 4\n5 5\n6 6\n7 7\n8 8"
},
{
"input": "1\n0",
"output": "NO"
},
{
"input": "4\n1 2 3 -5",
"output": "YES\n4\n1 1\n2 2\n3 3\n4 4"
},
{
... | 1,641,216,799 | 2,147,483,647 | Python 3 | OK | TESTS | 80 | 46 | 0 | #lesha/array splitting
n = int(input())
l_elements = list(map(int, input().split()))
if (l_elements.count(0) != n):
print('YES')
else:
print('NO')
n1 = sum(l_elements)
if n1 != 0:
print(1)
print(1,n)
else:
for _ in range(n):
n1 = l_elements[_]
if n1 != 0:
print(2)
print(1,_... | Title: Lesha and array splitting
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One spring day on his way to university Lesha found an array *A*. Lesha likes to split arrays into several parts. This time Lesha decided to split the array *A* into several, possibly one, new arrays so that t... | ```python
#lesha/array splitting
n = int(input())
l_elements = list(map(int, input().split()))
if (l_elements.count(0) != n):
print('YES')
else:
print('NO')
n1 = sum(l_elements)
if n1 != 0:
print(1)
print(1,n)
else:
for _ in range(n):
n1 = l_elements[_]
if n1 != 0:
print(2)
... | 3 | |
519 | B | A and B and Compilation Errors | PROGRAMMING | 1,100 | [
"data structures",
"implementation",
"sortings"
] | null | null | A and B are preparing themselves for programming contests.
B loves to debug his code. But before he runs the solution and starts debugging, he has to first compile the code.
Initially, the compiler displayed *n* compilation errors, each of them is represented as a positive integer. After some effort, B managed to fix... | The first line of the input contains integer *n* (3<=≤<=*n*<=≤<=105) — the initial number of compilation errors.
The second line contains *n* space-separated integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=109) — the errors the compiler displayed for the first time.
The third line contains *n*<=-<=1 space-sepa... | Print two numbers on a single line: the numbers of the compilation errors that disappeared after B made the first and the second correction, respectively. | [
"5\n1 5 8 123 7\n123 7 5 1\n5 1 7\n",
"6\n1 4 3 3 5 7\n3 7 5 4 3\n4 3 7 5\n"
] | [
"8\n123\n",
"1\n3\n"
] | In the first test sample B first corrects the error number 8, then the error number 123.
In the second test sample B first corrects the error number 1, then the error number 3. Note that if there are multiple errors with the same number, B can correct only one of them in one step. | 1,000 | [
{
"input": "5\n1 5 8 123 7\n123 7 5 1\n5 1 7",
"output": "8\n123"
},
{
"input": "6\n1 4 3 3 5 7\n3 7 5 4 3\n4 3 7 5",
"output": "1\n3"
},
{
"input": "3\n1 2 3\n3 2\n2",
"output": "1\n3"
},
{
"input": "10\n460626451 802090732 277246428 661369649 388684428 784303821 376287098 6... | 1,622,502,434 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 109 | 0 | s = int(input())
o = list(map(int, input().split()))
r = input()
a = list(map(int, input().split()))
alr = []
for i in o:
if i not in alr:
alr.append(i)
for j in range(o.count(i)-a.count(i)):
print(i)
| Title: A and B and Compilation Errors
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
A and B are preparing themselves for programming contests.
B loves to debug his code. But before he runs the solution and starts debugging, he has to first compile the code.
Initially, the compiler disp... | ```python
s = int(input())
o = list(map(int, input().split()))
r = input()
a = list(map(int, input().split()))
alr = []
for i in o:
if i not in alr:
alr.append(i)
for j in range(o.count(i)-a.count(i)):
print(i)
``` | 0 | |
21 | B | Intersection | PROGRAMMING | 2,000 | [
"implementation",
"math"
] | B. Intersection | 1 | 256 | You are given two set of points. The first set is determined by the equation *A*1*x*<=+<=*B*1*y*<=+<=*C*1<==<=0, and the second one is determined by the equation *A*2*x*<=+<=*B*2*y*<=+<=*C*2<==<=0.
Write the program which finds the number of points in the intersection of two given sets. | The first line of the input contains three integer numbers *A*1,<=*B*1,<=*C*1 separated by space. The second line contains three integer numbers *A*2,<=*B*2,<=*C*2 separated by space. All the numbers are between -100 and 100, inclusive. | Print the number of points in the intersection or -1 if there are infinite number of points. | [
"1 1 0\n2 2 0\n",
"1 1 0\n2 -2 0\n"
] | [
"-1\n",
"1\n"
] | none | 1,000 | [
{
"input": "1 1 0\n2 2 0",
"output": "-1"
},
{
"input": "1 1 0\n2 -2 0",
"output": "1"
},
{
"input": "0 0 0\n0 0 0",
"output": "-1"
},
{
"input": "1 1 1\n1 1 1",
"output": "-1"
},
{
"input": "8 3 -4\n-5 2 7",
"output": "1"
},
{
"input": "-1 -1 0\n0 -1 ... | 1,694,093,839 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 0 | 93 | 2,867,200 | a1, b1, c1 = list(map(float, input().split()))
a2, b2, c2 = list(map(float, input().split()))
if a1 / a2 != b1 / b2:
print('1')
elif a1 / a2 == b1 / b2 == c1 / c2:
if (a1 != 0 and b1 != 0 and c1 != 0):
print('-1')
else:
print('0')
else:
print('0') | Title: Intersection
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
You are given two set of points. The first set is determined by the equation *A*1*x*<=+<=*B*1*y*<=+<=*C*1<==<=0, and the second one is determined by the equation *A*2*x*<=+<=*B*2*y*<=+<=*C*2<==<=0.
Write the program which fin... | ```python
a1, b1, c1 = list(map(float, input().split()))
a2, b2, c2 = list(map(float, input().split()))
if a1 / a2 != b1 / b2:
print('1')
elif a1 / a2 == b1 / b2 == c1 / c2:
if (a1 != 0 and b1 != 0 and c1 != 0):
print('-1')
else:
print('0')
else:
print('0')
``` | -1 |
938 | B | Run For Your Prize | PROGRAMMING | 1,100 | [
"brute force",
"greedy"
] | null | null | You and your friend are participating in a TV show "Run For Your Prize".
At the start of the show *n* prizes are located on a straight line. *i*-th prize is located at position *a**i*. Positions of all prizes are distinct. You start at position 1, your friend — at position 106 (and there is no prize in any of these tw... | The first line contains one integer *n* (1<=≤<=*n*<=≤<=105) — the number of prizes.
The second line contains *n* integers *a*1, *a*2, ..., *a**n* (2<=≤<=*a**i*<=≤<=106<=-<=1) — the positions of the prizes. No two prizes are located at the same position. Positions are given in ascending order. | Print one integer — the minimum number of seconds it will take to collect all prizes. | [
"3\n2 3 9\n",
"2\n2 999995\n"
] | [
"8\n",
"5\n"
] | In the first example you take all the prizes: take the first at 1, the second at 2 and the third at 8.
In the second example you take the first prize in 1 second and your friend takes the other in 5 seconds, you do this simultaneously, so the total time is 5. | 0 | [
{
"input": "3\n2 3 9",
"output": "8"
},
{
"input": "2\n2 999995",
"output": "5"
},
{
"input": "1\n20",
"output": "19"
},
{
"input": "6\n2 3 500000 999997 999998 999999",
"output": "499999"
},
{
"input": "1\n999999",
"output": "1"
},
{
"input": "1\n5100... | 1,634,366,796 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 2 | 124 | 10,240,000 | n = int(input())
a = [int(c) for c in input().split()]
print(min(max(a)-1,1000000-max(a))) | Title: Run For Your Prize
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You and your friend are participating in a TV show "Run For Your Prize".
At the start of the show *n* prizes are located on a straight line. *i*-th prize is located at position *a**i*. Positions of all prizes are di... | ```python
n = int(input())
a = [int(c) for c in input().split()]
print(min(max(a)-1,1000000-max(a)))
``` | 0 | |
801 | B | Valued Keys | PROGRAMMING | 900 | [
"constructive algorithms",
"greedy",
"strings"
] | null | null | You found a mysterious function *f*. The function takes two strings *s*1 and *s*2. These strings must consist only of lowercase English letters, and must be the same length.
The output of the function *f* is another string of the same length. The *i*-th character of the output is equal to the minimum of the *i*-th cha... | The first line of input contains the string *x*.
The second line of input contains the string *y*.
Both *x* and *y* consist only of lowercase English letters, *x* and *y* have same length and this length is between 1 and 100. | If there is no string *z* such that *f*(*x*,<=*z*)<==<=*y*, print -1.
Otherwise, print a string *z* such that *f*(*x*,<=*z*)<==<=*y*. If there are multiple possible answers, print any of them. The string *z* should be the same length as *x* and *y* and consist only of lowercase English letters. | [
"ab\naa\n",
"nzwzl\nniwel\n",
"ab\nba\n"
] | [
"ba\n",
"xiyez\n",
"-1\n"
] | The first case is from the statement.
Another solution for the second case is "zizez"
There is no solution for the third case. That is, there is no *z* such that *f*("ab", *z*) = "ba". | 1,000 | [
{
"input": "ab\naa",
"output": "ba"
},
{
"input": "nzwzl\nniwel",
"output": "xiyez"
},
{
"input": "ab\nba",
"output": "-1"
},
{
"input": "r\nl",
"output": "l"
},
{
"input": "d\ny",
"output": "-1"
},
{
"input": "yvowz\ncajav",
"output": "cajav"
},... | 1,552,877,964 | 2,147,483,647 | Python 3 | OK | TESTS | 35 | 109 | 0 | a, b = input(), input()
for i in range(len(a)):
if (a[i] < b[i]): print(-1), exit(0)
print(b) | Title: Valued Keys
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You found a mysterious function *f*. The function takes two strings *s*1 and *s*2. These strings must consist only of lowercase English letters, and must be the same length.
The output of the function *f* is another string... | ```python
a, b = input(), input()
for i in range(len(a)):
if (a[i] < b[i]): print(-1), exit(0)
print(b)
``` | 3 | |
58 | A | Chat room | PROGRAMMING | 1,000 | [
"greedy",
"strings"
] | A. Chat room | 1 | 256 | Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letters can be deleted from the typed word so that it resulted in the word "hello". For example, ... | The first and only line contains the word *s*, which Vasya typed. This word consisits of small Latin letters, its length is no less that 1 and no more than 100 letters. | If Vasya managed to say hello, print "YES", otherwise print "NO". | [
"ahhellllloou\n",
"hlelo\n"
] | [
"YES\n",
"NO\n"
] | none | 500 | [
{
"input": "ahhellllloou",
"output": "YES"
},
{
"input": "hlelo",
"output": "NO"
},
{
"input": "helhcludoo",
"output": "YES"
},
{
"input": "hehwelloho",
"output": "YES"
},
{
"input": "pnnepelqomhhheollvlo",
"output": "YES"
},
{
"input": "tymbzjyqhymeda... | 1,488,715,743 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 46 | 4,608,000 | word = input().lower()
ans = "NO"
def occur(s, c):
return [i for i, l in enumerate(s) if l == c]
if word.find("h") < word.find("e") < word.find("o") and occur(word, "l")[0] + 1 == occur(word, "l")[1]:
ans = "YES"
print(ans)
| Title: Chat room
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya has recently learned to type and log on to the Internet. He immediately entered a chat room and decided to say hello to everybody. Vasya typed the word *s*. It is considered that Vasya managed to say hello if several letter... | ```python
word = input().lower()
ans = "NO"
def occur(s, c):
return [i for i, l in enumerate(s) if l == c]
if word.find("h") < word.find("e") < word.find("o") and occur(word, "l")[0] + 1 == occur(word, "l")[1]:
ans = "YES"
print(ans)
``` | 0 |
687 | B | Remainders Game | PROGRAMMING | 1,800 | [
"chinese remainder theorem",
"math",
"number theory"
] | null | null | Today Pari and Arya are playing a game called Remainders.
Pari chooses two positive integer *x* and *k*, and tells Arya *k* but not *x*. Arya have to find the value . There are *n* ancient numbers *c*1,<=*c*2,<=...,<=*c**n* and Pari has to tell Arya if Arya wants. Given *k* and the ancient values, tell us if Arya has... | The first line of the input contains two integers *n* and *k* (1<=≤<=*n*,<= *k*<=≤<=1<=000<=000) — the number of ancient integers and value *k* that is chosen by Pari.
The second line contains *n* integers *c*1,<=*c*2,<=...,<=*c**n* (1<=≤<=*c**i*<=≤<=1<=000<=000). | Print "Yes" (without quotes) if Arya has a winning strategy independent of value of *x*, or "No" (without quotes) otherwise. | [
"4 5\n2 3 5 12\n",
"2 7\n2 3\n"
] | [
"Yes\n",
"No\n"
] | In the first sample, Arya can understand <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/d170efffcde0907ee6bcf32de21051bce0677a2c.png" style="max-width: 100.0%;max-height: 100.0%;"/> because 5 is one of the ancient numbers.
In the second sample, Arya can't be sure what <img align="middle" ... | 1,000 | [
{
"input": "4 5\n2 3 5 12",
"output": "Yes"
},
{
"input": "2 7\n2 3",
"output": "No"
},
{
"input": "1 6\n8",
"output": "No"
},
{
"input": "2 3\n9 4",
"output": "Yes"
},
{
"input": "4 16\n19 16 13 9",
"output": "Yes"
},
{
"input": "5 10\n5 16 19 9 17",
... | 1,565,159,605 | 2,147,483,647 | PyPy 3 | TIME_LIMIT_EXCEEDED | TESTS | 10 | 1,000 | 8,908,800 | def gcd(a,b):
a,b=(a,b) if a>=b else (b,a)
while b:
a,b = b,a%b
return a
def lcm(a,b):
return a*b//gcd(a,b)
# n = int(input())
# k = int(input())
n,k=map(int,input().strip().split(' '))
l = 1
a=list(map(int,input().split(' ')))
# print(a)
for ai in a:
# tmp = int(input())
... | Title: Remainders Game
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Today Pari and Arya are playing a game called Remainders.
Pari chooses two positive integer *x* and *k*, and tells Arya *k* but not *x*. Arya have to find the value . There are *n* ancient numbers *c*1,<=*c*2,<=...,<=*... | ```python
def gcd(a,b):
a,b=(a,b) if a>=b else (b,a)
while b:
a,b = b,a%b
return a
def lcm(a,b):
return a*b//gcd(a,b)
# n = int(input())
# k = int(input())
n,k=map(int,input().strip().split(' '))
l = 1
a=list(map(int,input().split(' ')))
# print(a)
for ai in a:
# tmp = int(in... | 0 | |
456 | A | Laptops | PROGRAMMING | 1,100 | [
"sortings"
] | null | null | One day Dima and Alex had an argument about the price and quality of laptops. Dima thinks that the more expensive a laptop is, the better it is. Alex disagrees. Alex thinks that there are two laptops, such that the price of the first laptop is less (strictly smaller) than the price of the second laptop but the quality ... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=105) — the number of laptops.
Next *n* lines contain two integers each, *a**i* and *b**i* (1<=≤<=*a**i*,<=*b**i*<=≤<=*n*), where *a**i* is the price of the *i*-th laptop, and *b**i* is the number that represents the quality of the *i*-th laptop (the larger the numb... | If Alex is correct, print "Happy Alex", otherwise print "Poor Alex" (without the quotes). | [
"2\n1 2\n2 1\n"
] | [
"Happy Alex\n"
] | none | 500 | [
{
"input": "2\n1 2\n2 1",
"output": "Happy Alex"
},
{
"input": "2\n1 1\n2 2",
"output": "Poor Alex"
},
{
"input": "3\n2 2\n3 3\n1 1",
"output": "Poor Alex"
},
{
"input": "3\n3 3\n1 2\n2 1",
"output": "Happy Alex"
},
{
"input": "1\n1 1",
"output": "Poor Alex"
... | 1,684,836,038 | 2,147,483,647 | PyPy 3-64 | TIME_LIMIT_EXCEEDED | TESTS | 5 | 1,000 | 29,696,000 | sp = dict()
for i in range(int(input())):
a, b = map(int, input().split())
sp[a] = b
sp1 = sorted(sp.items(), key=lambda x: x[1], reverse=True)
for i, j in enumerate(sp1[:-1]):
if j[0] < min(sp1[i + 1:], key=lambda x: x[0])[0]:
print('Happy Alex')
break
else:
print('Poor Alex') | Title: Laptops
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Dima and Alex had an argument about the price and quality of laptops. Dima thinks that the more expensive a laptop is, the better it is. Alex disagrees. Alex thinks that there are two laptops, such that the price of the... | ```python
sp = dict()
for i in range(int(input())):
a, b = map(int, input().split())
sp[a] = b
sp1 = sorted(sp.items(), key=lambda x: x[1], reverse=True)
for i, j in enumerate(sp1[:-1]):
if j[0] < min(sp1[i + 1:], key=lambda x: x[0])[0]:
print('Happy Alex')
break
else:
print('P... | 0 | |
3 | A | Shortest path of the king | PROGRAMMING | 1,000 | [
"greedy",
"shortest paths"
] | A. Shortest path of the king | 1 | 64 | The king is left alone on the chessboard. In spite of this loneliness, he doesn't lose heart, because he has business of national importance. For example, he has to pay an official visit to square *t*. As the king is not in habit of wasting his time, he wants to get from his current position *s* to square *t* in the le... | The first line contains the chessboard coordinates of square *s*, the second line — of square *t*.
Chessboard coordinates consist of two characters, the first one is a lowercase Latin letter (from a to h), the second one is a digit from 1 to 8. | In the first line print *n* — minimum number of the king's moves. Then in *n* lines print the moves themselves. Each move is described with one of the 8: L, R, U, D, LU, LD, RU or RD.
L, R, U, D stand respectively for moves left, right, up and down (according to the picture), and 2-letter combinations stand for diago... | [
"a8\nh1\n"
] | [
"7\nRD\nRD\nRD\nRD\nRD\nRD\nRD\n"
] | none | 0 | [
{
"input": "a8\nh1",
"output": "7\nRD\nRD\nRD\nRD\nRD\nRD\nRD"
},
{
"input": "b2\nb4",
"output": "2\nU\nU"
},
{
"input": "a5\na5",
"output": "0"
},
{
"input": "h1\nb2",
"output": "6\nLU\nL\nL\nL\nL\nL"
},
{
"input": "c5\nh2",
"output": "5\nRD\nRD\nRD\nR\nR"
... | 1,609,768,333 | 2,147,483,647 | PyPy 3 | RUNTIME_ERROR | TESTS | 3 | 404 | 2,150,400 | s = input()
t = input()
alpha = ['a','b','c','d','e','f','g','h']
def next_letter(char):
return alpha[alpha.index(char) + 1]
def prev_letter(char):
return alpha[alpha.index(char) - 1]
cmds = []
while s != t:
c = ''
if s[0] < t[0]:
s = next_letter(s[0]) + s[1]
c += '... | Title: Shortest path of the king
Time Limit: 1 seconds
Memory Limit: 64 megabytes
Problem Description:
The king is left alone on the chessboard. In spite of this loneliness, he doesn't lose heart, because he has business of national importance. For example, he has to pay an official visit to square *t*. As the king ... | ```python
s = input()
t = input()
alpha = ['a','b','c','d','e','f','g','h']
def next_letter(char):
return alpha[alpha.index(char) + 1]
def prev_letter(char):
return alpha[alpha.index(char) - 1]
cmds = []
while s != t:
c = ''
if s[0] < t[0]:
s = next_letter(s[0]) + s[1]
... | -1 |
215 | A | Bicycle Chain | PROGRAMMING | 900 | [
"brute force",
"implementation"
] | null | null | Vasya's bicycle chain drive consists of two parts: *n* stars are attached to the pedal axle, *m* stars are attached to the rear wheel axle. The chain helps to rotate the rear wheel by transmitting the pedal rotation.
We know that the *i*-th star on the pedal axle has *a**i* (0<=<<=*a*1<=<<=*a*2<=<<=...<=<<... | The first input line contains integer *n* (1<=≤<=*n*<=≤<=50) — the number of stars on the bicycle's pedal axle. The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=104) in the order of strict increasing.
The third input line contains integer *m* (1<=≤<=*m*<=≤<=50) — the number of stars o... | Print the number of "integer" gears with the maximum ratio among all "integer" gears. | [
"2\n4 5\n3\n12 13 15\n",
"4\n1 2 3 4\n5\n10 11 12 13 14\n"
] | [
"2\n",
"1\n"
] | In the first sample the maximum "integer" gear ratio equals 3. There are two gears that have such gear ratio. For one of them *a*<sub class="lower-index">1</sub> = 4, *b*<sub class="lower-index">1</sub> = 12, and for the other *a*<sub class="lower-index">2</sub> = 5, *b*<sub class="lower-index">3</sub> = 15. | 500 | [
{
"input": "2\n4 5\n3\n12 13 15",
"output": "2"
},
{
"input": "4\n1 2 3 4\n5\n10 11 12 13 14",
"output": "1"
},
{
"input": "1\n1\n1\n1",
"output": "1"
},
{
"input": "2\n1 2\n1\n1",
"output": "1"
},
{
"input": "1\n1\n2\n1 2",
"output": "1"
},
{
"input":... | 1,585,204,331 | 2,147,483,647 | PyPy 3 | OK | TESTS | 57 | 466 | 1,331,200 | n = int(input())
a = list(map(int, input().split(" ")))
m = int(input())
b = list(map(int, input().split(" ")))
c = []
for i in range(len(a)):
for j in range(len(b)):
if b[j]%a[i]==0:
c.append(b[j]//a[i])
print(c.count(max(c)))
| Title: Bicycle Chain
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya's bicycle chain drive consists of two parts: *n* stars are attached to the pedal axle, *m* stars are attached to the rear wheel axle. The chain helps to rotate the rear wheel by transmitting the pedal rotation.
We ... | ```python
n = int(input())
a = list(map(int, input().split(" ")))
m = int(input())
b = list(map(int, input().split(" ")))
c = []
for i in range(len(a)):
for j in range(len(b)):
if b[j]%a[i]==0:
c.append(b[j]//a[i])
print(c.count(max(c)))
``` | 3 | |
922 | D | Robot Vacuum Cleaner | PROGRAMMING | 1,800 | [
"greedy",
"sortings"
] | null | null | Pushok the dog has been chasing Imp for a few hours already.
Fortunately, Imp knows that Pushok is afraid of a robot vacuum cleaner.
While moving, the robot generates a string *t* consisting of letters 's' and 'h', that produces a lot of noise. We define noise of string *t* as the number of occurrences of string "sh... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=105) — the number of strings in robot's memory.
Next *n* lines contain the strings *t*1,<=*t*2,<=...,<=*t**n*, one per line. It is guaranteed that the strings are non-empty, contain only English letters 's' and 'h' and their total length does not exceed 105. | Print a single integer — the maxumum possible noise Imp can achieve by changing the order of the strings. | [
"4\nssh\nhs\ns\nhhhs\n",
"2\nh\ns\n"
] | [
"18\n",
"1\n"
] | The optimal concatenation in the first sample is *ssshhshhhs*. | 1,500 | [
{
"input": "4\nssh\nhs\ns\nhhhs",
"output": "18"
},
{
"input": "2\nh\ns",
"output": "1"
},
{
"input": "6\nh\ns\nhhh\nh\nssssss\ns",
"output": "40"
},
{
"input": "1\ns",
"output": "0"
},
{
"input": "10\nsshshss\nhssssssssh\nhhhhhh\nhhhs\nhshhh\nhhhhshsh\nhh\nh\nshs... | 1,589,006,996 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 2 | 155 | 20,172,800 |
def count_s(s):
ret = 0
for k in s:
if k == 's':
ret += 1
return ret
def count_sh(s):
ret = 0
for i in range(len(s)):
for j in range(i+1,len(s)):
if s[i] == 's' and s[j] == 'h':
ret += 1
return ret
n = int(input())
ls ... | Title: Robot Vacuum Cleaner
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Pushok the dog has been chasing Imp for a few hours already.
Fortunately, Imp knows that Pushok is afraid of a robot vacuum cleaner.
While moving, the robot generates a string *t* consisting of letters 's' and '... | ```python
def count_s(s):
ret = 0
for k in s:
if k == 's':
ret += 1
return ret
def count_sh(s):
ret = 0
for i in range(len(s)):
for j in range(i+1,len(s)):
if s[i] == 's' and s[j] == 'h':
ret += 1
return ret
n = int(inp... | 0 | |
465 | B | Inbox (100500) | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Over time, Alexey's mail box got littered with too many letters. Some of them are read, while others are unread.
Alexey's mail program can either show a list of all letters or show the content of a single letter. As soon as the program shows the content of an unread letter, it becomes read letter (if the program shows... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of letters in the mailbox.
The second line contains *n* space-separated integers (zeros and ones) — the state of the letter list. The *i*-th number equals either 1, if the *i*-th number is unread, or 0, if the *i*-th letter is read. | Print a single number — the minimum number of operations needed to make all the letters read. | [
"5\n0 1 0 1 0\n",
"5\n1 1 0 0 1\n",
"2\n0 0\n"
] | [
"3\n",
"4\n",
"0\n"
] | In the first sample Alexey needs three operations to cope with the task: open the second letter, move to the third one, move to the fourth one.
In the second sample the action plan: open the first letter, move to the second letter, return to the list, open the fifth letter.
In the third sample all letters are already... | 1,000 | [
{
"input": "5\n0 1 0 1 0",
"output": "3"
},
{
"input": "5\n1 1 0 0 1",
"output": "4"
},
{
"input": "2\n0 0",
"output": "0"
},
{
"input": "9\n1 0 1 0 1 0 1 0 1",
"output": "9"
},
{
"input": "5\n1 1 1 1 1",
"output": "5"
},
{
"input": "14\n0 0 1 1 1 0 1 ... | 1,410,107,500 | 3,700 | Python 3 | OK | TESTS | 44 | 61 | 0 | n = int(input())
mailbox = list(map(int, input().split())) + [0]
ans = 0
for i in range(n):
if mailbox[i] == 1:
ans += 1
if mailbox[i + 1] == 0:
ans += 1
print(max(0, ans - 1)) | Title: Inbox (100500)
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Over time, Alexey's mail box got littered with too many letters. Some of them are read, while others are unread.
Alexey's mail program can either show a list of all letters or show the content of a single letter. As soo... | ```python
n = int(input())
mailbox = list(map(int, input().split())) + [0]
ans = 0
for i in range(n):
if mailbox[i] == 1:
ans += 1
if mailbox[i + 1] == 0:
ans += 1
print(max(0, ans - 1))
``` | 3 | |
870 | A | Search for Pretty Integers | PROGRAMMING | 900 | [
"brute force",
"implementation"
] | null | null | You are given two lists of non-zero digits.
Let's call an integer pretty if its (base 10) representation has at least one digit from the first list and at least one digit from the second list. What is the smallest positive pretty integer? | The first line contains two integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=9) — the lengths of the first and the second lists, respectively.
The second line contains *n* distinct digits *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=9) — the elements of the first list.
The third line contains *m* distinct digits *b*1,<=*b*2... | Print the smallest pretty integer. | [
"2 3\n4 2\n5 7 6\n",
"8 8\n1 2 3 4 5 6 7 8\n8 7 6 5 4 3 2 1\n"
] | [
"25\n",
"1\n"
] | In the first example 25, 46, 24567 are pretty, as well as many other integers. The smallest among them is 25. 42 and 24 are not pretty because they don't have digits from the second list.
In the second example all integers that have at least one digit different from 9 are pretty. It's obvious that the smallest among t... | 500 | [
{
"input": "2 3\n4 2\n5 7 6",
"output": "25"
},
{
"input": "8 8\n1 2 3 4 5 6 7 8\n8 7 6 5 4 3 2 1",
"output": "1"
},
{
"input": "1 1\n9\n1",
"output": "19"
},
{
"input": "9 1\n5 4 2 3 6 1 7 9 8\n9",
"output": "9"
},
{
"input": "5 3\n7 2 5 8 6\n3 1 9",
"output"... | 1,567,913,079 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 1 | 124 | 0 | l = list(input().split())
l2 = list(input().split())
l3 = list(input().split())
sot = ''
lot1 = min(l2)
lot2 = min(l3)
sot += min(lot1, lot2) + max(lot1, lot2)
print(sot) | Title: Search for Pretty Integers
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given two lists of non-zero digits.
Let's call an integer pretty if its (base 10) representation has at least one digit from the first list and at least one digit from the second list. What is the sm... | ```python
l = list(input().split())
l2 = list(input().split())
l3 = list(input().split())
sot = ''
lot1 = min(l2)
lot2 = min(l3)
sot += min(lot1, lot2) + max(lot1, lot2)
print(sot)
``` | 0 | |
515 | E | Drazil and Park | PROGRAMMING | 2,300 | [
"data structures"
] | null | null | Drazil is a monkey. He lives in a circular park. There are *n* trees around the park. The distance between the *i*-th tree and (*i*<=+<=1)-st trees is *d**i*, the distance between the *n*-th tree and the first tree is *d**n*. The height of the *i*-th tree is *h**i*.
Drazil starts each day with the morning run. The mor... | The first line contains two integer *n* and *m* (3<=≤<=*n*<=≤<=105, 1<=≤<=*m*<=≤<=105), denoting number of trees and number of days, respectively.
The second line contains *n* integers *d*1,<=*d*2,<=...,<=*d**n* (1<=≤<=*d**i*<=≤<=109), the distances between consecutive trees.
The third line contains *n* integers *h*... | For each day print the answer in a separate line. | [
"5 3\n2 2 2 2 2\n3 5 2 1 4\n1 3\n2 2\n4 5\n",
"3 3\n5 1 4\n5 1 4\n3 3\n2 2\n1 1\n"
] | [
"12\n16\n18\n",
"17\n22\n11\n"
] | none | 3,000 | [
{
"input": "5 3\n2 2 2 2 2\n3 5 2 1 4\n1 3\n2 2\n4 5",
"output": "12\n16\n18"
},
{
"input": "3 3\n5 1 4\n5 1 4\n3 3\n2 2\n1 1",
"output": "17\n22\n11"
},
{
"input": "10 10\n8477 33103 38654 6582 27496 1106 15985 3644 29818 8849\n88745 72099 87767 85285 73517 94562 87214 63194 83791 77619... | 1,691,378,793 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | print("_RANDOM_GUESS_1691378793.4948297")# 1691378793.4948473 | Title: Drazil and Park
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Drazil is a monkey. He lives in a circular park. There are *n* trees around the park. The distance between the *i*-th tree and (*i*<=+<=1)-st trees is *d**i*, the distance between the *n*-th tree and the first tree is *... | ```python
print("_RANDOM_GUESS_1691378793.4948297")# 1691378793.4948473
``` | 0 | |
651 | A | Joysticks | PROGRAMMING | 1,100 | [
"dp",
"greedy",
"implementation",
"math"
] | null | null | Friends are going to play console. They have two joysticks and only one charger for them. Initially first joystick is charged at *a*1 percent and second one is charged at *a*2 percent. You can connect charger to a joystick only at the beginning of each minute. In one minute joystick either discharges by 2 percent (if n... | The first line of the input contains two positive integers *a*1 and *a*2 (1<=≤<=*a*1,<=*a*2<=≤<=100), the initial charge level of first and second joystick respectively. | Output the only integer, the maximum number of minutes that the game can last. Game continues until some joystick is discharged. | [
"3 5\n",
"4 4\n"
] | [
"6\n",
"5\n"
] | In the first sample game lasts for 6 minute by using the following algorithm:
- at the beginning of the first minute connect first joystick to the charger, by the end of this minute first joystick is at 4%, second is at 3%; - continue the game without changing charger, by the end of the second minute the first joyst... | 500 | [
{
"input": "3 5",
"output": "6"
},
{
"input": "4 4",
"output": "5"
},
{
"input": "100 100",
"output": "197"
},
{
"input": "1 100",
"output": "98"
},
{
"input": "100 1",
"output": "98"
},
{
"input": "1 4",
"output": "2"
},
{
"input": "1 1",
... | 1,569,848,428 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 0 | 108 | 0 | a, b = map(int, input().split())
max_num = max(a, b)
min_num = min(a, b)
ans = 0
while min(max_num, min_num) > 0:
min_num += 1
max_num -= 2
max_num, min_num = max(max_num, min_num), min(max_num, min_num)
if min_num < 1:
break
ans += 1
print(ans)
| Title: Joysticks
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Friends are going to play console. They have two joysticks and only one charger for them. Initially first joystick is charged at *a*1 percent and second one is charged at *a*2 percent. You can connect charger to a joystick on... | ```python
a, b = map(int, input().split())
max_num = max(a, b)
min_num = min(a, b)
ans = 0
while min(max_num, min_num) > 0:
min_num += 1
max_num -= 2
max_num, min_num = max(max_num, min_num), min(max_num, min_num)
if min_num < 1:
break
ans += 1
print(ans)
``` | 0 | |
626 | B | Cards | PROGRAMMING | 1,300 | [
"constructive algorithms",
"dp",
"math"
] | null | null | Catherine has a deck of *n* cards, each of which is either red, green, or blue. As long as there are at least two cards left, she can do one of two actions:
- take any two (not necessarily adjacent) cards with different colors and exchange them for a new card of the third color; - take any two (not necessarily adja... | The first line of the input contains a single integer *n* (1<=≤<=*n*<=≤<=200) — the total number of cards.
The next line contains a string *s* of length *n* — the colors of the cards. *s* contains only the characters 'B', 'G', and 'R', representing blue, green, and red, respectively. | Print a single string of up to three characters — the possible colors of the final card (using the same symbols as the input) in alphabetical order. | [
"2\nRB\n",
"3\nGRG\n",
"5\nBBBBB\n"
] | [
"G\n",
"BR\n",
"B\n"
] | In the first sample, Catherine has one red card and one blue card, which she must exchange for a green card.
In the second sample, Catherine has two green cards and one red card. She has two options: she can exchange the two green cards for a green card, then exchange the new green card and the red card for a blue car... | 750 | [
{
"input": "2\nRB",
"output": "G"
},
{
"input": "3\nGRG",
"output": "BR"
},
{
"input": "5\nBBBBB",
"output": "B"
},
{
"input": "1\nR",
"output": "R"
},
{
"input": "200\nBBRGRRBBRGGGBGBGBGRRGRGRGRBGRGRRBBGRGBGRRGRRRGGBBRGBGBGBRBBBBBBBGGBRGGRRRGGRGBGBGGBRRRRBRRRBRBB... | 1,637,558,468 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 3 | 46 | 0 | n = int(input())
colors = list(input())
b, g, r = colors.count('B'), colors.count('G'), colors.count('R')
if b * g * r != 0 or (b >= 2 and g >= 2) or (b >= 2 and r >= 2) or (g >= 2 and
r >= 2):
print('BGR')
elif b != 0 and r == 0 and g == 0:
p... | Title: Cards
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Catherine has a deck of *n* cards, each of which is either red, green, or blue. As long as there are at least two cards left, she can do one of two actions:
- take any two (not necessarily adjacent) cards with different colors... | ```python
n = int(input())
colors = list(input())
b, g, r = colors.count('B'), colors.count('G'), colors.count('R')
if b * g * r != 0 or (b >= 2 and g >= 2) or (b >= 2 and r >= 2) or (g >= 2 and
r >= 2):
print('BGR')
elif b != 0 and r == 0 and g =... | 0 | |
876 | B | Divisiblity of Differences | PROGRAMMING | 1,300 | [
"implementation",
"math",
"number theory"
] | null | null | You are given a multiset of *n* integers. You should select exactly *k* of them in a such way that the difference between any two of them is divisible by *m*, or tell that it is impossible.
Numbers can be repeated in the original multiset and in the multiset of selected numbers, but number of occurrences of any number... | First line contains three integers *n*, *k* and *m* (2<=≤<=*k*<=≤<=*n*<=≤<=100<=000, 1<=≤<=*m*<=≤<=100<=000) — number of integers in the multiset, number of integers you should select and the required divisor of any pair of selected integers.
Second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (0<=≤<=*a**i*<=... | If it is not possible to select *k* numbers in the desired way, output «No» (without the quotes).
Otherwise, in the first line of output print «Yes» (without the quotes). In the second line print *k* integers *b*1,<=*b*2,<=...,<=*b**k* — the selected numbers. If there are multiple possible solutions, print any of them... | [
"3 2 3\n1 8 4\n",
"3 3 3\n1 8 4\n",
"4 3 5\n2 7 7 7\n"
] | [
"Yes\n1 4 ",
"No",
"Yes\n2 7 7 "
] | none | 1,000 | [
{
"input": "3 2 3\n1 8 4",
"output": "Yes\n1 4 "
},
{
"input": "3 3 3\n1 8 4",
"output": "No"
},
{
"input": "4 3 5\n2 7 7 7",
"output": "Yes\n2 7 7 "
},
{
"input": "9 9 5\n389149775 833127990 969340400 364457730 48649145 316121525 640054660 924273385 973207825",
"output":... | 1,648,061,237 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 9 | 249 | 13,312,000 | import sys, os.path
if(os.path.exists('input.txt')):
sys.stdin = open("input.txt","r")
sys.stdout = open("outpput.txt","w")
n,k,m=map(int,input().split())
l=list(map(int,input().split()))
l1=[]
lm=[]
se=set()
for i in range(n):
l1.append(l[i]%m)
for j in range(n):
if l1[j] not in se:
se.add(l... | Title: Divisiblity of Differences
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
You are given a multiset of *n* integers. You should select exactly *k* of them in a such way that the difference between any two of them is divisible by *m*, or tell that it is impossible.
Numbers can be re... | ```python
import sys, os.path
if(os.path.exists('input.txt')):
sys.stdin = open("input.txt","r")
sys.stdout = open("outpput.txt","w")
n,k,m=map(int,input().split())
l=list(map(int,input().split()))
l1=[]
lm=[]
se=set()
for i in range(n):
l1.append(l[i]%m)
for j in range(n):
if l1[j] not in se:
... | 0 | |
59 | A | Word | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Word | 2 | 256 | Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it either only consisted of lowercase letters or, vice versa, only of uppercase ones. At th... | The first line contains a word *s* — it consists of uppercase and lowercase Latin letters and possesses the length from 1 to 100. | Print the corrected word *s*. If the given word *s* has strictly more uppercase letters, make the word written in the uppercase register, otherwise - in the lowercase one. | [
"HoUse\n",
"ViP\n",
"maTRIx\n"
] | [
"house\n",
"VIP\n",
"matrix\n"
] | none | 500 | [
{
"input": "HoUse",
"output": "house"
},
{
"input": "ViP",
"output": "VIP"
},
{
"input": "maTRIx",
"output": "matrix"
},
{
"input": "BNHWpnpawg",
"output": "bnhwpnpawg"
},
{
"input": "VTYGP",
"output": "VTYGP"
},
{
"input": "CHNenu",
"output": "chn... | 1,678,752,069 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 30 | 0 | s=input()
countu=0
countl=0
for i in range(s):
if ord(i)>=65 and ord(i)<=96:
countu+=1
else:
countl+=1
if countl>countu:
print(s.upper())
else:
print(s.lower()) | Title: Word
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it ei... | ```python
s=input()
countu=0
countl=0
for i in range(s):
if ord(i)>=65 and ord(i)<=96:
countu+=1
else:
countl+=1
if countl>countu:
print(s.upper())
else:
print(s.lower())
``` | -1 |
791 | A | Bear and Big Brother | PROGRAMMING | 800 | [
"implementation"
] | null | null | Bear Limak wants to become the largest of bears, or at least to become larger than his brother Bob.
Right now, Limak and Bob weigh *a* and *b* respectively. It's guaranteed that Limak's weight is smaller than or equal to his brother's weight.
Limak eats a lot and his weight is tripled after every year, while Bob's we... | The only line of the input contains two integers *a* and *b* (1<=≤<=*a*<=≤<=*b*<=≤<=10) — the weight of Limak and the weight of Bob respectively. | Print one integer, denoting the integer number of years after which Limak will become strictly larger than Bob. | [
"4 7\n",
"4 9\n",
"1 1\n"
] | [
"2\n",
"3\n",
"1\n"
] | In the first sample, Limak weighs 4 and Bob weighs 7 initially. After one year their weights are 4·3 = 12 and 7·2 = 14 respectively (one weight is tripled while the other one is doubled). Limak isn't larger than Bob yet. After the second year weights are 36 and 28, so the first weight is greater than the second one. Li... | 500 | [
{
"input": "4 7",
"output": "2"
},
{
"input": "4 9",
"output": "3"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "4 6",
"output": "2"
},
{
"input": "1 10",
"output": "6"
},
{
"input": "1 1",
"output": "1"
},
{
"input": "1 2",
"output... | 1,699,456,508 | 2,147,483,647 | Python 3 | OK | TESTS | 62 | 46 | 0 | a,b=map(int,input().split())
i=0
while a<b or a==b:
i=i+1
a=a*3
b=b*2
print(i) | Title: Bear and Big Brother
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Bear Limak wants to become the largest of bears, or at least to become larger than his brother Bob.
Right now, Limak and Bob weigh *a* and *b* respectively. It's guaranteed that Limak's weight is smaller than or e... | ```python
a,b=map(int,input().split())
i=0
while a<b or a==b:
i=i+1
a=a*3
b=b*2
print(i)
``` | 3 | |
59 | A | Word | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Word | 2 | 256 | Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it either only consisted of lowercase letters or, vice versa, only of uppercase ones. At th... | The first line contains a word *s* — it consists of uppercase and lowercase Latin letters and possesses the length from 1 to 100. | Print the corrected word *s*. If the given word *s* has strictly more uppercase letters, make the word written in the uppercase register, otherwise - in the lowercase one. | [
"HoUse\n",
"ViP\n",
"maTRIx\n"
] | [
"house\n",
"VIP\n",
"matrix\n"
] | none | 500 | [
{
"input": "HoUse",
"output": "house"
},
{
"input": "ViP",
"output": "VIP"
},
{
"input": "maTRIx",
"output": "matrix"
},
{
"input": "BNHWpnpawg",
"output": "bnhwpnpawg"
},
{
"input": "VTYGP",
"output": "VTYGP"
},
{
"input": "CHNenu",
"output": "chn... | 1,644,948,781 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 1 | 92 | 0 | s=input()
sm='a b c d e f g h i j k l m n o p q r s t u v w x y z'.split()
smc=0
bc=0
b='A B C D E F G H I J K L M N O P Q R S T U V W X Y Z'.split()
for i in range( len(s)):
if s[i] in sm:
smc+=1
else:
bc+=1
if smc>bc:
print(s.lower())
else:
print(s.capitalize()) | Title: Word
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Vasya is very upset that many people on the Net mix uppercase and lowercase letters in one word. That's why he decided to invent an extension for his favorite browser that would change the letters' register in every word so that it ei... | ```python
s=input()
sm='a b c d e f g h i j k l m n o p q r s t u v w x y z'.split()
smc=0
bc=0
b='A B C D E F G H I J K L M N O P Q R S T U V W X Y Z'.split()
for i in range( len(s)):
if s[i] in sm:
smc+=1
else:
bc+=1
if smc>bc:
print(s.lower())
else:
print(s.capitalize())
... | 0 |
352 | A | Jeff and Digits | PROGRAMMING | 1,000 | [
"brute force",
"implementation",
"math"
] | null | null | Jeff's got *n* cards, each card contains either digit 0, or digit 5. Jeff can choose several cards and put them in a line so that he gets some number. What is the largest possible number divisible by 90 Jeff can make from the cards he's got?
Jeff must make the number without leading zero. At that, we assume that numbe... | The first line contains integer *n* (1<=≤<=*n*<=≤<=103). The next line contains *n* integers *a*1, *a*2, ..., *a**n* (*a**i*<==<=0 or *a**i*<==<=5). Number *a**i* represents the digit that is written on the *i*-th card. | In a single line print the answer to the problem — the maximum number, divisible by 90. If you can't make any divisible by 90 number from the cards, print -1. | [
"4\n5 0 5 0\n",
"11\n5 5 5 5 5 5 5 5 0 5 5\n"
] | [
"0\n",
"5555555550\n"
] | In the first test you can make only one number that is a multiple of 90 — 0.
In the second test you can make number 5555555550, it is a multiple of 90. | 500 | [
{
"input": "4\n5 0 5 0",
"output": "0"
},
{
"input": "11\n5 5 5 5 5 5 5 5 0 5 5",
"output": "5555555550"
},
{
"input": "7\n5 5 5 5 5 5 5",
"output": "-1"
},
{
"input": "1\n5",
"output": "-1"
},
{
"input": "1\n0",
"output": "0"
},
{
"input": "11\n5 0 5 ... | 1,658,486,200 | 2,147,483,647 | Python 3 | OK | TESTS | 42 | 92 | 0 |
num_inp=lambda: int(input())
arr_inp=lambda: list(map(int,input().split()))
sp_inp=lambda: map(int,input().split())
str_inp=lambda:input()
a,b=int(input()),input();c=b.count('5');d=a-c
print(int('5'*(9*(c//9))+'0'*d) if d!=0 else '-1')
| Title: Jeff and Digits
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Jeff's got *n* cards, each card contains either digit 0, or digit 5. Jeff can choose several cards and put them in a line so that he gets some number. What is the largest possible number divisible by 90 Jeff can make fr... | ```python
num_inp=lambda: int(input())
arr_inp=lambda: list(map(int,input().split()))
sp_inp=lambda: map(int,input().split())
str_inp=lambda:input()
a,b=int(input()),input();c=b.count('5');d=a-c
print(int('5'*(9*(c//9))+'0'*d) if d!=0 else '-1')
``` | 3 | |
893 | B | Beautiful Divisors | PROGRAMMING | 1,000 | [
"brute force",
"implementation"
] | null | null | Recently Luba learned about a special kind of numbers that she calls beautiful numbers. The number is called beautiful iff its binary representation consists of *k*<=+<=1 consecutive ones, and then *k* consecutive zeroes.
Some examples of beautiful numbers:
- 12 (110); - 1102 (610); - 11110002 (12010); - 1111100... | The only line of input contains one number *n* (1<=≤<=*n*<=≤<=105) — the number Luba has got. | Output one number — the greatest beautiful divisor of Luba's number. It is obvious that the answer always exists. | [
"3\n",
"992\n"
] | [
"1\n",
"496\n"
] | none | 0 | [
{
"input": "3",
"output": "1"
},
{
"input": "992",
"output": "496"
},
{
"input": "81142",
"output": "1"
},
{
"input": "76920",
"output": "120"
},
{
"input": "2016",
"output": "2016"
},
{
"input": "1",
"output": "1"
},
{
"input": "6",
"o... | 1,634,463,092 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 49 | 77 | 0 | from math import*
n = int(input())
k = 1
for i in range(1, ceil(log(n)/log(2)) + 1):
x = pow(2, i) - 1
y = pow(2, i - 1)
if n % (x * y) == 0:
k = x * y
print(int(k))
| Title: Beautiful Divisors
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Recently Luba learned about a special kind of numbers that she calls beautiful numbers. The number is called beautiful iff its binary representation consists of *k*<=+<=1 consecutive ones, and then *k* consecutive ze... | ```python
from math import*
n = int(input())
k = 1
for i in range(1, ceil(log(n)/log(2)) + 1):
x = pow(2, i) - 1
y = pow(2, i - 1)
if n % (x * y) == 0:
k = x * y
print(int(k))
``` | 3 | |
361 | B | Levko and Permutation | PROGRAMMING | 1,200 | [
"constructive algorithms",
"math",
"number theory"
] | null | null | Levko loves permutations very much. A permutation of length *n* is a sequence of distinct positive integers, each is at most *n*.
Let’s assume that value *gcd*(*a*,<=*b*) shows the greatest common divisor of numbers *a* and *b*. Levko assumes that element *p**i* of permutation *p*1,<=*p*2,<=... ,<=*p**n* is good if *g... | The single line contains two integers *n* and *k* (1<=≤<=*n*<=≤<=105, 0<=≤<=*k*<=≤<=*n*). | In a single line print either any beautiful permutation or -1, if such permutation doesn’t exist.
If there are multiple suitable permutations, you are allowed to print any of them. | [
"4 2\n",
"1 1\n"
] | [
"2 4 3 1",
"-1\n"
] | In the first sample elements 4 and 3 are good because *gcd*(2, 4) = 2 > 1 and *gcd*(3, 3) = 3 > 1. Elements 2 and 1 are not good because *gcd*(1, 2) = 1 and *gcd*(4, 1) = 1. As there are exactly 2 good elements, the permutation is beautiful.
The second sample has no beautiful permutations. | 1,000 | [
{
"input": "4 2",
"output": "2 1 3 4 "
},
{
"input": "1 1",
"output": "-1"
},
{
"input": "7 4",
"output": "3 1 2 4 5 6 7 "
},
{
"input": "10 9",
"output": "1 2 3 4 5 6 7 8 9 10 "
},
{
"input": "10000 5000",
"output": "5000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1... | 1,601,581,636 | 2,147,483,647 | PyPy 3 | WRONG_ANSWER | TESTS | 2 | 124 | 0 | n, k = [int(x) for x in input().split()]
cont = 0
resp = [0]*n
ntem = n - k
a = 0
b = n-1
m = 1
p = n
for i in range(ntem):
if i % 2 == 0:
resp[a] = p
a += 1
p -= 1
else:
resp[b] = m
b -= 1
m += 1
for i in range(a,b+1):
if resp[i] =... | Title: Levko and Permutation
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Levko loves permutations very much. A permutation of length *n* is a sequence of distinct positive integers, each is at most *n*.
Let’s assume that value *gcd*(*a*,<=*b*) shows the greatest common divisor of numb... | ```python
n, k = [int(x) for x in input().split()]
cont = 0
resp = [0]*n
ntem = n - k
a = 0
b = n-1
m = 1
p = n
for i in range(ntem):
if i % 2 == 0:
resp[a] = p
a += 1
p -= 1
else:
resp[b] = m
b -= 1
m += 1
for i in range(a,b+1):
if... | 0 | |
445 | A | DZY Loves Chessboard | PROGRAMMING | 1,200 | [
"dfs and similar",
"implementation"
] | null | null | DZY loves chessboard, and he enjoys playing with it.
He has a chessboard of *n* rows and *m* columns. Some cells of the chessboard are bad, others are good. For every good cell, DZY wants to put a chessman on it. Each chessman is either white or black. After putting all chessmen, DZY wants that no two chessmen with th... | The first line contains two space-separated integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100).
Each of the next *n* lines contains a string of *m* characters: the *j*-th character of the *i*-th string is either "." or "-". A "." means that the corresponding cell (in the *i*-th row and the *j*-th column) is good, while a ... | Output must contain *n* lines, each line must contain a string of *m* characters. The *j*-th character of the *i*-th string should be either "W", "B" or "-". Character "W" means the chessman on the cell is white, "B" means it is black, "-" means the cell is a bad cell.
If multiple answers exist, print any of them. It ... | [
"1 1\n.\n",
"2 2\n..\n..\n",
"3 3\n.-.\n---\n--."
] | [
"B\n",
"BW\nWB\n",
"B-B\n---\n--B"
] | In the first sample, DZY puts a single black chessman. Of course putting a white one is also OK.
In the second sample, all 4 cells are good. No two same chessmen share an edge in the sample output.
In the third sample, no good cells are adjacent. So you can just put 3 chessmen, no matter what their colors are. | 500 | [
{
"input": "1 1\n.",
"output": "B"
},
{
"input": "2 2\n..\n..",
"output": "BW\nWB"
},
{
"input": "3 3\n.-.\n---\n--.",
"output": "B-B\n---\n--B"
},
{
"input": "3 1\n-\n.\n.",
"output": "-\nW\nB"
},
{
"input": "11 11\n-----------\n-----------\n-----------\n--------... | 1,661,263,925 | 2,147,483,647 | PyPy 3-64 | WRONG_ANSWER | TESTS | 0 | 46 | 0 | n,m=map(int,input().split())
# a=list(map(int,input().split()))
mat=[]
for i in range(n):
mat.append(list(input()))
for i in range(n):
for j in range(m):
if mat[i][j]==".":
mat[i][j]="B"
for i in range(n):
for j in range(m):
if i==0 and j==0:
continue
... | Title: DZY Loves Chessboard
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
DZY loves chessboard, and he enjoys playing with it.
He has a chessboard of *n* rows and *m* columns. Some cells of the chessboard are bad, others are good. For every good cell, DZY wants to put a chessman on it. ... | ```python
n,m=map(int,input().split())
# a=list(map(int,input().split()))
mat=[]
for i in range(n):
mat.append(list(input()))
for i in range(n):
for j in range(m):
if mat[i][j]==".":
mat[i][j]="B"
for i in range(n):
for j in range(m):
if i==0 and j==0:
... | 0 | |
995 | B | Suit and Tie | PROGRAMMING | 1,400 | [
"greedy",
"implementation",
"math"
] | null | null | Allen is hosting a formal dinner party. $2n$ people come to the event in $n$ pairs (couples). After a night of fun, Allen wants to line everyone up for a final picture. The $2n$ people line up, but Allen doesn't like the ordering. Allen prefers if each pair occupies adjacent positions in the line, as this makes the pic... | The first line contains a single integer $n$ ($1 \le n \le 100$), the number of pairs of people.
The second line contains $2n$ integers $a_1, a_2, \dots, a_{2n}$. For each $i$ with $1 \le i \le n$, $i$ appears exactly twice. If $a_j = a_k = i$, that means that the $j$-th and $k$-th people in the line form a couple. | Output a single integer, representing the minimum number of adjacent swaps needed to line the people up so that each pair occupies adjacent positions. | [
"4\n1 1 2 3 3 2 4 4\n",
"3\n1 1 2 2 3 3\n",
"3\n3 1 2 3 1 2\n"
] | [
"2\n",
"0\n",
"3\n"
] | In the first sample case, we can transform $1 1 2 3 3 2 4 4 \rightarrow 1 1 2 3 2 3 4 4 \rightarrow 1 1 2 2 3 3 4 4$ in two steps. Note that the sequence $1 1 2 3 3 2 4 4 \rightarrow 1 1 3 2 3 2 4 4 \rightarrow 1 1 3 3 2 2 4 4$ also works in the same number of steps.
The second sample case already satisfies the constr... | 750 | [
{
"input": "4\n1 1 2 3 3 2 4 4",
"output": "2"
},
{
"input": "3\n1 1 2 2 3 3",
"output": "0"
},
{
"input": "3\n3 1 2 3 1 2",
"output": "3"
},
{
"input": "8\n7 6 2 1 4 3 3 7 2 6 5 1 8 5 8 4",
"output": "27"
},
{
"input": "2\n1 2 1 2",
"output": "1"
},
{
... | 1,541,513,687 | 2,147,483,647 | Python 3 | OK | TESTS | 22 | 109 | 0 | n = int(input())
line = [int(x) for x in input().split()]
ans = 0
while len(line) > 0:
a = line.pop(0)
ans += line.index(a)
line.remove(a)
print(ans)
| Title: Suit and Tie
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Allen is hosting a formal dinner party. $2n$ people come to the event in $n$ pairs (couples). After a night of fun, Allen wants to line everyone up for a final picture. The $2n$ people line up, but Allen doesn't like the o... | ```python
n = int(input())
line = [int(x) for x in input().split()]
ans = 0
while len(line) > 0:
a = line.pop(0)
ans += line.index(a)
line.remove(a)
print(ans)
``` | 3 | |
364 | B | Free Market | PROGRAMMING | 2,200 | [
"dp",
"greedy"
] | null | null | John Doe has recently found a "Free Market" in his city — that is the place where you can exchange some of your possessions for other things for free.
John knows that his city has *n* items in total (each item is unique). You can bring any number of items to the market and exchange them for any other one. Note that e... | The first line contains two space-separated integers *n*, *d* (1<=≤<=*n*<=≤<=50, 1<=≤<=*d*<=≤<=104) — the number of items on the market and John's sense of justice value, correspondingly. The second line contains *n* space-separated integers *c**i* (1<=≤<=*c**i*<=≤<=104). | Print two space-separated integers: the maximum possible price in the set of items John can get and the minimum number of days needed to get such set. | [
"3 2\n1 3 10\n",
"3 5\n1 2 3\n",
"10 10000\n10000 9999 1 10000 10000 10000 1 2 3 4\n"
] | [
"4 3\n",
"6 2\n",
"50010 6\n"
] | In the first sample John can act like this:
- Take the first item (1 - 0 ≤ 2). - Exchange the first item for the second one (3 - 1 ≤ 2). - Take the first item (1 - 0 ≤ 2). | 1,000 | [] | 1,696,582,787 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 31 | 0 | # Hydro submission #651fcc7f6739e4142b1f55fe@1696582784568
def min_weeks_to_max_value(n, k, values):
values.sort()
weeks = 0
total_value = 0
current_gifts = []
while values:
if weeks == 0:
bai_piao_gift = max([gift for gift in values if gift <= k], default=0)
... | Title: Free Market
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
John Doe has recently found a "Free Market" in his city — that is the place where you can exchange some of your possessions for other things for free.
John knows that his city has *n* items in total (each item is unique).... | ```python
# Hydro submission #651fcc7f6739e4142b1f55fe@1696582784568
def min_weeks_to_max_value(n, k, values):
values.sort()
weeks = 0
total_value = 0
current_gifts = []
while values:
if weeks == 0:
bai_piao_gift = max([gift for gift in values if gift <= k], default=0)
... | 0 | |
255 | A | Greg's Workout | PROGRAMMING | 800 | [
"implementation"
] | null | null | Greg is a beginner bodybuilder. Today the gym coach gave him the training plan. All it had was *n* integers *a*1,<=*a*2,<=...,<=*a**n*. These numbers mean that Greg needs to do exactly *n* exercises today. Besides, Greg should repeat the *i*-th in order exercise *a**i* times.
Greg now only does three types of exercise... | The first line contains integer *n* (1<=≤<=*n*<=≤<=20). The second line contains *n* integers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=25) — the number of times Greg repeats the exercises. | Print word "chest" (without the quotes), if the chest gets the most exercise, "biceps" (without the quotes), if the biceps gets the most exercise and print "back" (without the quotes) if the back gets the most exercise.
It is guaranteed that the input is such that the answer to the problem is unambiguous. | [
"2\n2 8\n",
"3\n5 1 10\n",
"7\n3 3 2 7 9 6 8\n"
] | [
"biceps\n",
"back\n",
"chest\n"
] | In the first sample Greg does 2 chest, 8 biceps and zero back exercises, so the biceps gets the most exercises.
In the second sample Greg does 5 chest, 1 biceps and 10 back exercises, so the back gets the most exercises.
In the third sample Greg does 18 chest, 12 biceps and 8 back exercises, so the chest gets the mos... | 500 | [
{
"input": "2\n2 8",
"output": "biceps"
},
{
"input": "3\n5 1 10",
"output": "back"
},
{
"input": "7\n3 3 2 7 9 6 8",
"output": "chest"
},
{
"input": "4\n5 6 6 2",
"output": "chest"
},
{
"input": "5\n8 2 2 6 3",
"output": "chest"
},
{
"input": "6\n8 7 ... | 1,667,041,819 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 60 | 0 | n=int(input())
a=list(map(int,input().split()))
k1=5
k2=3
k3=4
g=0
b=0
s=0
for i in range(n):
if k1%5==0:
g+=a[i]
k2+=3
elif k2%3==0:
b+=a[i]
k3+=4
elif k3%4==0:
s+=a[i]
k1+=5
if g==max(g,b,s):
print('chest')
elif b==max(g,b,s):
pr... | Title: Greg's Workout
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Greg is a beginner bodybuilder. Today the gym coach gave him the training plan. All it had was *n* integers *a*1,<=*a*2,<=...,<=*a**n*. These numbers mean that Greg needs to do exactly *n* exercises today. Besides, Greg ... | ```python
n=int(input())
a=list(map(int,input().split()))
k1=5
k2=3
k3=4
g=0
b=0
s=0
for i in range(n):
if k1%5==0:
g+=a[i]
k2+=3
elif k2%3==0:
b+=a[i]
k3+=4
elif k3%4==0:
s+=a[i]
k1+=5
if g==max(g,b,s):
print('chest')
elif b==max(g,b,s... | 0 | |
260 | A | Adding Digits | PROGRAMMING | 1,400 | [
"implementation",
"math"
] | null | null | Vasya has got two number: *a* and *b*. However, Vasya finds number *a* too short. So he decided to repeat the operation of lengthening number *a* *n* times.
One operation of lengthening a number means adding exactly one digit to the number (in the decimal notation) to the right provided that the resulting number is di... | The first line contains three integers: *a*,<=*b*,<=*n* (1<=≤<=*a*,<=*b*,<=*n*<=≤<=105). | In a single line print the integer without leading zeros, which Vasya can get when he applies the lengthening operations to number *a* *n* times. If no such number exists, then print number -1. If there are multiple possible answers, print any of them. | [
"5 4 5\n",
"12 11 1\n",
"260 150 10\n"
] | [
"524848\n",
"121\n",
"-1\n"
] | none | 500 | [
{
"input": "5 4 5",
"output": "524848"
},
{
"input": "12 11 1",
"output": "121"
},
{
"input": "260 150 10",
"output": "-1"
},
{
"input": "78843 5684 42717",
"output": "-1"
},
{
"input": "93248 91435 1133",
"output": "-1"
},
{
"input": "100000 10 64479"... | 1,678,165,141 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | a, b, n = map(int, input().split())
# Check if we can find a number divisible by b using only one digit.
# If not, return -1.
if a % b != 0:
a *= 10
n -= 1
if a % b != 0:
print("-1")
exit()
# Append a "0" n times to the end of a and print the result.
a = str(a) + "0" * n
print... | Title: Adding Digits
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya has got two number: *a* and *b*. However, Vasya finds number *a* too short. So he decided to repeat the operation of lengthening number *a* *n* times.
One operation of lengthening a number means adding exactly one ... | ```python
a, b, n = map(int, input().split())
# Check if we can find a number divisible by b using only one digit.
# If not, return -1.
if a % b != 0:
a *= 10
n -= 1
if a % b != 0:
print("-1")
exit()
# Append a "0" n times to the end of a and print the result.
a = str(a) + "0" ... | 0 | |
465 | B | Inbox (100500) | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Over time, Alexey's mail box got littered with too many letters. Some of them are read, while others are unread.
Alexey's mail program can either show a list of all letters or show the content of a single letter. As soon as the program shows the content of an unread letter, it becomes read letter (if the program shows... | The first line contains a single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of letters in the mailbox.
The second line contains *n* space-separated integers (zeros and ones) — the state of the letter list. The *i*-th number equals either 1, if the *i*-th number is unread, or 0, if the *i*-th letter is read. | Print a single number — the minimum number of operations needed to make all the letters read. | [
"5\n0 1 0 1 0\n",
"5\n1 1 0 0 1\n",
"2\n0 0\n"
] | [
"3\n",
"4\n",
"0\n"
] | In the first sample Alexey needs three operations to cope with the task: open the second letter, move to the third one, move to the fourth one.
In the second sample the action plan: open the first letter, move to the second letter, return to the list, open the fifth letter.
In the third sample all letters are already... | 1,000 | [
{
"input": "5\n0 1 0 1 0",
"output": "3"
},
{
"input": "5\n1 1 0 0 1",
"output": "4"
},
{
"input": "2\n0 0",
"output": "0"
},
{
"input": "9\n1 0 1 0 1 0 1 0 1",
"output": "9"
},
{
"input": "5\n1 1 1 1 1",
"output": "5"
},
{
"input": "14\n0 0 1 1 1 0 1 ... | 1,679,017,302 | 2,147,483,647 | Python 3 | OK | TESTS | 44 | 46 | 0 | n_letters = int(input())
list_letters = list(map(int, input().split()))
count_clicks = list_letters[0]
voltou_pagina = False
for i in range(len(list_letters) - 1):
atual = list_letters[i]
proximo = list_letters[i+1]
if atual == 0 and proximo == 1:
count_clicks += 1
voltou_pagina = False
... | Title: Inbox (100500)
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Over time, Alexey's mail box got littered with too many letters. Some of them are read, while others are unread.
Alexey's mail program can either show a list of all letters or show the content of a single letter. As soo... | ```python
n_letters = int(input())
list_letters = list(map(int, input().split()))
count_clicks = list_letters[0]
voltou_pagina = False
for i in range(len(list_letters) - 1):
atual = list_letters[i]
proximo = list_letters[i+1]
if atual == 0 and proximo == 1:
count_clicks += 1
voltou_pagina... | 3 | |
104 | A | Blackjack | PROGRAMMING | 800 | [
"implementation"
] | A. Blackjack | 2 | 256 | One rainy gloomy evening when all modules hid in the nearby cafes to drink hot energetic cocktails, the Hexadecimal virus decided to fly over the Mainframe to look for a Great Idea. And she has found one!
Why not make her own Codeforces, with blackjack and other really cool stuff? Many people will surely be willing to... | The only line contains *n* (1<=≤<=*n*<=≤<=25) — the required sum of points. | Print the numbers of ways to get the second card in the required way if the first card is the queen of spades. | [
"12\n",
"20\n",
"10\n"
] | [
"4",
"15",
"0"
] | In the first sample only four two's of different suits can earn the required sum of points.
In the second sample we can use all tens, jacks, queens and kings; overall it's 15 cards, as the queen of spades (as any other card) is only present once in the pack of cards and it's already in use.
In the third sample there ... | 500 | [
{
"input": "12",
"output": "4"
},
{
"input": "20",
"output": "15"
},
{
"input": "10",
"output": "0"
},
{
"input": "11",
"output": "4"
},
{
"input": "15",
"output": "4"
},
{
"input": "18",
"output": "4"
},
{
"input": "25",
"output": "0"
... | 1,591,894,597 | 2,147,483,647 | PyPy 3 | OK | TESTS | 25 | 310 | 0 | n = int(input())
sm = 0
x = 10
l = [2 , 3 , 4 ,5 ,6 , 7 , 8 ,9 , 10 ]
l2 = [10 , 10 , 10]
l3 = [1 , 11]
y = n - x
for i in l :
if i == y:
sm += 4
for i in l2 :
if i == y :
sm += 4
if y == 10 :
sm -=1
for i in l3 :
if i == y :
sm += 4
print(sm)
| Title: Blackjack
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
One rainy gloomy evening when all modules hid in the nearby cafes to drink hot energetic cocktails, the Hexadecimal virus decided to fly over the Mainframe to look for a Great Idea. And she has found one!
Why not make her own Co... | ```python
n = int(input())
sm = 0
x = 10
l = [2 , 3 , 4 ,5 ,6 , 7 , 8 ,9 , 10 ]
l2 = [10 , 10 , 10]
l3 = [1 , 11]
y = n - x
for i in l :
if i == y:
sm += 4
for i in l2 :
if i == y :
sm += 4
if y == 10 :
sm -=1
for i in l3 :
if i == y :
sm += 4
prin... | 3.9225 |
776 | A | A Serial Killer | PROGRAMMING | 900 | [
"brute force",
"implementation",
"strings"
] | null | null | Our beloved detective, Sherlock is currently trying to catch a serial killer who kills a person each day. Using his powers of deduction, he came to know that the killer has a strategy for selecting his next victim.
The killer starts with two potential victims on his first day, selects one of these two, kills selected ... | First line of input contains two names (length of each of them doesn't exceed 10), the two initials potential victims. Next line contains integer *n* (1<=≤<=*n*<=≤<=1000), the number of days.
Next *n* lines contains two names (length of each of them doesn't exceed 10), first being the person murdered on this day and t... | Output *n*<=+<=1 lines, the *i*-th line should contain the two persons from which the killer selects for the *i*-th murder. The (*n*<=+<=1)-th line should contain the two persons from which the next victim is selected. In each line, the two names can be printed in any order. | [
"ross rachel\n4\nross joey\nrachel phoebe\nphoebe monica\nmonica chandler\n",
"icm codeforces\n1\ncodeforces technex\n"
] | [
"ross rachel\njoey rachel\njoey phoebe\njoey monica\njoey chandler\n",
"icm codeforces\nicm technex\n"
] | In first example, the killer starts with ross and rachel.
- After day 1, ross is killed and joey appears. - After day 2, rachel is killed and phoebe appears. - After day 3, phoebe is killed and monica appears. - After day 4, monica is killed and chandler appears. | 500 | [
{
"input": "ross rachel\n4\nross joey\nrachel phoebe\nphoebe monica\nmonica chandler",
"output": "ross rachel\njoey rachel\njoey phoebe\njoey monica\njoey chandler"
},
{
"input": "icm codeforces\n1\ncodeforces technex",
"output": "icm codeforces\nicm technex"
},
{
"input": "a b\n3\na c\n... | 1,613,065,955 | 2,147,483,647 | Python 3 | OK | TESTS | 57 | 77 | 307,200 | #A Serial Killer
l1=[]
l2=[]
a,b=map(str,input().split())
l1.append(a)
l2.append(b)
n=int(input())
for i in range(n):
x,y=map(str,input().split())
if x in l1:
l1.append(y)
l2.append(l2[-1])
elif x in l2:
l1.append(l1[-1])
l2.append(y)
else:
... | Title: A Serial Killer
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Our beloved detective, Sherlock is currently trying to catch a serial killer who kills a person each day. Using his powers of deduction, he came to know that the killer has a strategy for selecting his next victim.
The... | ```python
#A Serial Killer
l1=[]
l2=[]
a,b=map(str,input().split())
l1.append(a)
l2.append(b)
n=int(input())
for i in range(n):
x,y=map(str,input().split())
if x in l1:
l1.append(y)
l2.append(l2[-1])
elif x in l2:
l1.append(l1[-1])
l2.append(y)
el... | 3 | |
25 | A | IQ test | PROGRAMMING | 1,300 | [
"brute force"
] | A. IQ test | 2 | 256 | Bob is preparing to pass IQ test. The most frequent task in this test is to find out which one of the given *n* numbers differs from the others. Bob observed that one number usually differs from the others in evenness. Help Bob — to check his answers, he needs a program that among the given *n* numbers finds one that i... | The first line contains integer *n* (3<=≤<=*n*<=≤<=100) — amount of numbers in the task. The second line contains *n* space-separated natural numbers, not exceeding 100. It is guaranteed, that exactly one of these numbers differs from the others in evenness. | Output index of number that differs from the others in evenness. Numbers are numbered from 1 in the input order. | [
"5\n2 4 7 8 10\n",
"4\n1 2 1 1\n"
] | [
"3\n",
"2\n"
] | none | 0 | [
{
"input": "5\n2 4 7 8 10",
"output": "3"
},
{
"input": "4\n1 2 1 1",
"output": "2"
},
{
"input": "3\n1 2 2",
"output": "1"
},
{
"input": "3\n100 99 100",
"output": "2"
},
{
"input": "3\n5 3 2",
"output": "3"
},
{
"input": "4\n43 28 1 91",
"output"... | 1,573,487,315 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 218 | 0 | '''n = int(input())
s = [int(i) for i in input().split()]
for i in range(1,n):
if s[0] % 2 == 0 and s[1] % 2 != 0 and s[2] % 2 != 0 or s[0] % 2 == 1 and s[1] % 2 != 1 and s[2] % 2 != 1:
print(1)
break
elif s[-1] % 2 == 0 and s[-2] % 2 != 0 and s[-3] % 2 != 0 or s[-1] % 2 == 1 and s[-2] % 2... | Title: IQ test
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Bob is preparing to pass IQ test. The most frequent task in this test is to find out which one of the given *n* numbers differs from the others. Bob observed that one number usually differs from the others in evenness. Help Bob — t... | ```python
'''n = int(input())
s = [int(i) for i in input().split()]
for i in range(1,n):
if s[0] % 2 == 0 and s[1] % 2 != 0 and s[2] % 2 != 0 or s[0] % 2 == 1 and s[1] % 2 != 1 and s[2] % 2 != 1:
print(1)
break
elif s[-1] % 2 == 0 and s[-2] % 2 != 0 and s[-3] % 2 != 0 or s[-1] % 2 == 1 and... | 3.9455 |
25 | A | IQ test | PROGRAMMING | 1,300 | [
"brute force"
] | A. IQ test | 2 | 256 | Bob is preparing to pass IQ test. The most frequent task in this test is to find out which one of the given *n* numbers differs from the others. Bob observed that one number usually differs from the others in evenness. Help Bob — to check his answers, he needs a program that among the given *n* numbers finds one that i... | The first line contains integer *n* (3<=≤<=*n*<=≤<=100) — amount of numbers in the task. The second line contains *n* space-separated natural numbers, not exceeding 100. It is guaranteed, that exactly one of these numbers differs from the others in evenness. | Output index of number that differs from the others in evenness. Numbers are numbered from 1 in the input order. | [
"5\n2 4 7 8 10\n",
"4\n1 2 1 1\n"
] | [
"3\n",
"2\n"
] | none | 0 | [
{
"input": "5\n2 4 7 8 10",
"output": "3"
},
{
"input": "4\n1 2 1 1",
"output": "2"
},
{
"input": "3\n1 2 2",
"output": "1"
},
{
"input": "3\n100 99 100",
"output": "2"
},
{
"input": "3\n5 3 2",
"output": "3"
},
{
"input": "4\n43 28 1 91",
"output"... | 1,648,575,300 | 2,147,483,647 | Python 3 | OK | TESTS | 32 | 92 | 0 | n=int(input())
l=list(map(int,input().split()))
o=0
e=0
O=[]
E=[]
if l[0]%2==0:
e+=1
E.append(1)
else:
o+=1
O.append(1)
for i in range(1,n):
if (l[i]%2==0):
e+=1
E.append(i+1)
else:
o+=1
O.append(i+1)
if o>e and e==1:
print(E[0])
... | Title: IQ test
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Bob is preparing to pass IQ test. The most frequent task in this test is to find out which one of the given *n* numbers differs from the others. Bob observed that one number usually differs from the others in evenness. Help Bob — t... | ```python
n=int(input())
l=list(map(int,input().split()))
o=0
e=0
O=[]
E=[]
if l[0]%2==0:
e+=1
E.append(1)
else:
o+=1
O.append(1)
for i in range(1,n):
if (l[i]%2==0):
e+=1
E.append(i+1)
else:
o+=1
O.append(i+1)
if o>e and e==1:
prin... | 3.977 |
182 | B | Vasya's Calendar | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | Vasya lives in a strange world. The year has *n* months and the *i*-th month has *a**i* days. Vasya got a New Year present — the clock that shows not only the time, but also the date.
The clock's face can display any number from 1 to *d*. It is guaranteed that *a**i*<=≤<=*d* for all *i* from 1 to *n*. The clock does n... | The first line contains the single number *d* — the maximum number of the day that Vasya's clock can show (1<=≤<=*d*<=≤<=106).
The second line contains a single integer *n* — the number of months in the year (1<=≤<=*n*<=≤<=2000).
The third line contains *n* space-separated integers: *a**i* (1<=≤<=*a**i*<=≤<=*d*) — th... | Print a single number — the number of times Vasya manually increased the day number by one throughout the last year. | [
"4\n2\n2 2\n",
"5\n3\n3 4 3\n",
"31\n12\n31 28 31 30 31 30 31 31 30 31 30 31\n"
] | [
"2\n",
"3\n",
"7\n"
] | In the first sample the situation is like this:
- Day 1. Month 1. The clock shows 1. Vasya changes nothing. - Day 2. Month 1. The clock shows 2. Vasya changes nothing. - Day 1. Month 2. The clock shows 3. Vasya manually increases the day number by 1. After that the clock shows 4. Vasya increases the day number by ... | 500 | [
{
"input": "4\n2\n2 2",
"output": "2"
},
{
"input": "5\n3\n3 4 3",
"output": "3"
},
{
"input": "31\n12\n31 28 31 30 31 30 31 31 30 31 30 31",
"output": "7"
},
{
"input": "1\n1\n1",
"output": "0"
},
{
"input": "1\n2\n1 1",
"output": "0"
},
{
"input": "2... | 1,623,313,430 | 2,147,483,647 | PyPy 3 | OK | TESTS | 40 | 218 | 1,638,400 | d = int(input())
n = int(input())
daf = list(map(int, input().split()))
total = 0
for i in range(n - 1):
total += d - daf[i]
print(total)
| Title: Vasya's Calendar
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya lives in a strange world. The year has *n* months and the *i*-th month has *a**i* days. Vasya got a New Year present — the clock that shows not only the time, but also the date.
The clock's face can display any ... | ```python
d = int(input())
n = int(input())
daf = list(map(int, input().split()))
total = 0
for i in range(n - 1):
total += d - daf[i]
print(total)
``` | 3 | |
114 | B | PFAST Inc. | PROGRAMMING | 1,500 | [
"bitmasks",
"brute force",
"graphs"
] | null | null | When little Petya grew up and entered the university, he started to take part in АСМ contests. Later he realized that he doesn't like how the АСМ contests are organised: the team could only have three members (and he couldn't take all his friends to the competitions and distribute the tasks between the team members eff... | The first line contains two integer numbers *n* (1<=≤<=*n*<=≤<=16) — the number of volunteers, and *m* () — the number of pairs that do not get on. Next *n* lines contain the volunteers' names (each name is a non-empty string consisting of no more than 10 uppercase and/or lowercase Latin letters). Next *m* lines contai... | The first output line should contain the single number *k* — the number of people in the sought team. Next *k* lines should contain the names of the sought team's participants in the lexicographical order. If there are several variants to solve the problem, print any of them. Petya might not be a member of the sought t... | [
"3 1\nPetya\nVasya\nMasha\nPetya Vasya\n",
"3 0\nPasha\nLesha\nVanya\n"
] | [
"2\nMasha\nPetya\n",
"3\nLesha\nPasha\nVanya\n"
] | none | 1,000 | [
{
"input": "3 1\nPetya\nVasya\nMasha\nPetya Vasya",
"output": "2\nMasha\nPetya"
},
{
"input": "3 0\nPasha\nLesha\nVanya",
"output": "3\nLesha\nPasha\nVanya"
},
{
"input": "7 12\nPasha\nLesha\nVanya\nTaras\nNikita\nSergey\nAndrey\nPasha Taras\nPasha Nikita\nPasha Andrey\nPasha Sergey\nLes... | 1,665,916,211 | 2,147,483,647 | PyPy 3-64 | RUNTIME_ERROR | TESTS | 2 | 122 | 2,867,200 | import sys
input = sys.stdin.readline
n, m = map(int, input().split())
d = [[] for i in range(n)]
g = [input()[:-1] for _ in range(n)]
s = {j:i for i, j in enumerate(g)}
for i in range(m):
a, b = input()[:-1].split()
d[s[a]].append(b)
d[s[b]].append(a)
q = [g.copy()]
c = 0
dd = []
while q... | Title: PFAST Inc.
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
When little Petya grew up and entered the university, he started to take part in АСМ contests. Later he realized that he doesn't like how the АСМ contests are organised: the team could only have three members (and he couldn'... | ```python
import sys
input = sys.stdin.readline
n, m = map(int, input().split())
d = [[] for i in range(n)]
g = [input()[:-1] for _ in range(n)]
s = {j:i for i, j in enumerate(g)}
for i in range(m):
a, b = input()[:-1].split()
d[s[a]].append(b)
d[s[b]].append(a)
q = [g.copy()]
c = 0
dd = [... | -1 | |
743 | C | Vladik and fractions | PROGRAMMING | 1,500 | [
"brute force",
"constructive algorithms",
"math",
"number theory"
] | null | null | Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer *n* he can represent fraction as a sum of three distinct positive fractions in form .
Help Vladik with that, i.e for a given *n* find three distinct positive integers *x*, *y* and *z* such that . Because ... | The single line contains single integer *n* (1<=≤<=*n*<=≤<=104). | If the answer exists, print 3 distinct numbers *x*, *y* and *z* (1<=≤<=*x*,<=*y*,<=*z*<=≤<=109, *x*<=≠<=*y*, *x*<=≠<=*z*, *y*<=≠<=*z*). Otherwise print -1.
If there are multiple answers, print any of them. | [
"3\n",
"7\n"
] | [
"2 7 42\n",
"7 8 56\n"
] | none | 1,250 | [
{
"input": "3",
"output": "2 7 42"
},
{
"input": "7",
"output": "7 8 56"
},
{
"input": "2",
"output": "2 3 6"
},
{
"input": "5",
"output": "5 6 30"
},
{
"input": "4",
"output": "4 5 20"
},
{
"input": "7",
"output": "7 8 56"
},
{
"input": "8... | 1,520,515,829 | 2,147,483,647 | Python 3 | OK | TESTS | 62 | 77 | 5,632,000 | n = int(input())
if not(n+1 == n*(n+1)): print(n, n+1, n*(n+1))
else: print(-1)
# 1520515828082
| Title: Vladik and fractions
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vladik and Chloe decided to determine who of them is better at math. Vladik claimed that for any positive integer *n* he can represent fraction as a sum of three distinct positive fractions in form .
Help Vladik ... | ```python
n = int(input())
if not(n+1 == n*(n+1)): print(n, n+1, n*(n+1))
else: print(-1)
# 1520515828082
``` | 3 | |
455 | A | Boredom | PROGRAMMING | 1,500 | [
"dp"
] | null | null | Alex doesn't like boredom. That's why whenever he gets bored, he comes up with games. One long winter evening he came up with a game and decided to play it.
Given a sequence *a* consisting of *n* integers. The player can make several steps. In a single step he can choose an element of the sequence (let's denote it *a*... | The first line contains integer *n* (1<=≤<=*n*<=≤<=105) that shows how many numbers are in Alex's sequence.
The second line contains *n* integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=105). | Print a single integer — the maximum number of points that Alex can earn. | [
"2\n1 2\n",
"3\n1 2 3\n",
"9\n1 2 1 3 2 2 2 2 3\n"
] | [
"2\n",
"4\n",
"10\n"
] | Consider the third test example. At first step we need to choose any element equal to 2. After that step our sequence looks like this [2, 2, 2, 2]. Then we do 4 steps, on each step we choose any element equals to 2. In total we earn 10 points. | 500 | [
{
"input": "2\n1 2",
"output": "2"
},
{
"input": "3\n1 2 3",
"output": "4"
},
{
"input": "9\n1 2 1 3 2 2 2 2 3",
"output": "10"
},
{
"input": "5\n3 3 4 5 4",
"output": "11"
},
{
"input": "5\n5 3 5 3 4",
"output": "16"
},
{
"input": "5\n4 2 3 2 5",
... | 1,669,882,355 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 47 | 93 | 15,872,000 | n = int(input())
l1 = list(map(int, input().split()))
max_num = max(l1)
l2 = [i for i in range(max_num+1)]
cnt = [0] * (max_num + 1)
for i in l1:
cnt[i] += 1
dp = [0] * (max_num + 1)
dp[0] = 0
dp[1] = cnt[1]*l2[1]
for i in range(2, max_num + 1):
dp[i] = max(dp[i - 1], dp[i - 2] + cnt[i]*l2[i])
print... | Title: Boredom
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Alex doesn't like boredom. That's why whenever he gets bored, he comes up with games. One long winter evening he came up with a game and decided to play it.
Given a sequence *a* consisting of *n* integers. The player can make ... | ```python
n = int(input())
l1 = list(map(int, input().split()))
max_num = max(l1)
l2 = [i for i in range(max_num+1)]
cnt = [0] * (max_num + 1)
for i in l1:
cnt[i] += 1
dp = [0] * (max_num + 1)
dp[0] = 0
dp[1] = cnt[1]*l2[1]
for i in range(2, max_num + 1):
dp[i] = max(dp[i - 1], dp[i - 2] + cnt[i]*l2[... | 3 | |
873 | A | Chores | PROGRAMMING | 800 | [
"implementation"
] | null | null | Luba has to do *n* chores today. *i*-th chore takes *a**i* units of time to complete. It is guaranteed that for every the condition *a**i*<=≥<=*a**i*<=-<=1 is met, so the sequence is sorted.
Also Luba can work really hard on some chores. She can choose not more than *k* any chores and do each of them in *x* units of ... | The first line contains three integers *n*,<=*k*,<=*x* (1<=≤<=*k*<=≤<=*n*<=≤<=100,<=1<=≤<=*x*<=≤<=99) — the number of chores Luba has to do, the number of chores she can do in *x* units of time, and the number *x* itself.
The second line contains *n* integer numbers *a**i* (2<=≤<=*a**i*<=≤<=100) — the time Luba has to... | Print one number — minimum time Luba needs to do all *n* chores. | [
"4 2 2\n3 6 7 10\n",
"5 2 1\n100 100 100 100 100\n"
] | [
"13\n",
"302\n"
] | In the first example the best option would be to do the third and the fourth chore, spending *x* = 2 time on each instead of *a*<sub class="lower-index">3</sub> and *a*<sub class="lower-index">4</sub>, respectively. Then the answer is 3 + 6 + 2 + 2 = 13.
In the second example Luba can choose any two chores to spend *x... | 0 | [
{
"input": "4 2 2\n3 6 7 10",
"output": "13"
},
{
"input": "5 2 1\n100 100 100 100 100",
"output": "302"
},
{
"input": "1 1 1\n100",
"output": "1"
},
{
"input": "100 1 99\n100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 100 ... | 1,686,670,903 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 11 | 61 | 0 | from collections import deque
n, k, x = map(int, input().split())
lst = list(map(int, input().split()))
deq = deque(lst)
res = 0
for _ in range(k):
res += min(x, deq.pop())
print(res + sum(deq)) | Title: Chores
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Luba has to do *n* chores today. *i*-th chore takes *a**i* units of time to complete. It is guaranteed that for every the condition *a**i*<=≥<=*a**i*<=-<=1 is met, so the sequence is sorted.
Also Luba can work really hard on s... | ```python
from collections import deque
n, k, x = map(int, input().split())
lst = list(map(int, input().split()))
deq = deque(lst)
res = 0
for _ in range(k):
res += min(x, deq.pop())
print(res + sum(deq))
``` | 3 | |
220 | B | Little Elephant and Array | PROGRAMMING | 1,800 | [
"constructive algorithms",
"data structures"
] | null | null | The Little Elephant loves playing with arrays. He has array *a*, consisting of *n* positive integers, indexed from 1 to *n*. Let's denote the number with index *i* as *a**i*.
Additionally the Little Elephant has *m* queries to the array, each query is characterised by a pair of integers *l**j* and *r**j* (1<=≤<=*l**j... | The first line contains two space-separated integers *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=105) — the size of array *a* and the number of queries to it. The next line contains *n* space-separated positive integers *a*1, *a*2, ..., *a**n* (1<=≤<=*a**i*<=≤<=109). Next *m* lines contain descriptions of queries, one per line. T... | In *m* lines print *m* integers — the answers to the queries. The *j*-th line should contain the answer to the *j*-th query. | [
"7 2\n3 1 2 2 3 3 7\n1 7\n3 4\n"
] | [
"3\n1\n"
] | none | 1,000 | [
{
"input": "7 2\n3 1 2 2 3 3 7\n1 7\n3 4",
"output": "3\n1"
},
{
"input": "6 6\n1 2 2 3 3 3\n1 2\n2 2\n1 3\n2 4\n4 6\n1 6",
"output": "1\n0\n2\n1\n1\n3"
},
{
"input": "1 2\n1\n1 1\n1 1",
"output": "1\n1"
},
{
"input": "1 1\n1000000000\n1 1",
"output": "0"
}
] | 1,596,710,636 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 77 | 6,963,200 | n,m=list(map(int,input().split()))
li=list(map(int,input().split()))
for i in range(m):
l,r=list(map(int,input().split()))
x=li[l-1:r]
m=list(set(x))
m.sort()
k=len(x)
n=[]
print(x)
for j in range(len(m)):
if m[j]<=k:
n.append(m[j])
else:
... | Title: Little Elephant and Array
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
The Little Elephant loves playing with arrays. He has array *a*, consisting of *n* positive integers, indexed from 1 to *n*. Let's denote the number with index *i* as *a**i*.
Additionally the Little Elephant... | ```python
n,m=list(map(int,input().split()))
li=list(map(int,input().split()))
for i in range(m):
l,r=list(map(int,input().split()))
x=li[l-1:r]
m=list(set(x))
m.sort()
k=len(x)
n=[]
print(x)
for j in range(len(m)):
if m[j]<=k:
n.append(m[j])
else:... | 0 | |
454 | B | Little Pony and Sort by Shift | PROGRAMMING | 1,200 | [
"implementation"
] | null | null | One day, Twilight Sparkle is interested in how to sort a sequence of integers *a*1,<=*a*2,<=...,<=*a**n* in non-decreasing order. Being a young unicorn, the only operation she can perform is a unit shift. That is, she can move the last element of the sequence to its beginning:
Help Twilight Sparkle to calculate: what ... | The first line contains an integer *n* (2<=≤<=*n*<=≤<=105). The second line contains *n* integer numbers *a*1,<=*a*2,<=...,<=*a**n* (1<=≤<=*a**i*<=≤<=105). | If it's impossible to sort the sequence output -1. Otherwise output the minimum number of operations Twilight Sparkle needs to sort it. | [
"2\n2 1\n",
"3\n1 3 2\n",
"2\n1 2\n"
] | [
"1\n",
"-1\n",
"0\n"
] | none | 1,000 | [
{
"input": "2\n2 1",
"output": "1"
},
{
"input": "3\n1 3 2",
"output": "-1"
},
{
"input": "2\n1 2",
"output": "0"
},
{
"input": "6\n3 4 5 6 3 2",
"output": "-1"
},
{
"input": "3\n1 2 1",
"output": "1"
},
{
"input": "5\n1 1 2 1 1",
"output": "2"
}... | 1,615,607,257 | 2,147,483,647 | Python 3 | OK | TESTS | 56 | 155 | 7,782,400 | n = int(input())
arr=list(map(int,input().split()))
i = n-1
cnt = 0
while i>=0:
if arr[i]>=arr[i-1]:
i-=1
cnt+=1
else:
break
if arr==sorted(arr):
print(0)
elif arr[i:]+arr[0:i]==sorted(arr):
print(cnt+1)
else:
print(-1)
| Title: Little Pony and Sort by Shift
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day, Twilight Sparkle is interested in how to sort a sequence of integers *a*1,<=*a*2,<=...,<=*a**n* in non-decreasing order. Being a young unicorn, the only operation she can perform is a unit shift. ... | ```python
n = int(input())
arr=list(map(int,input().split()))
i = n-1
cnt = 0
while i>=0:
if arr[i]>=arr[i-1]:
i-=1
cnt+=1
else:
break
if arr==sorted(arr):
print(0)
elif arr[i:]+arr[0:i]==sorted(arr):
print(cnt+1)
else:
print(-1)
``` | 3 | |
633 | B | A Trivial Problem | PROGRAMMING | 1,300 | [
"brute force",
"constructive algorithms",
"math",
"number theory"
] | null | null | Mr. Santa asks all the great programmers of the world to solve a trivial problem. He gives them an integer *m* and asks for the number of positive integers *n*, such that the factorial of *n* ends with exactly *m* zeroes. Are you among those great programmers who can solve this problem? | The only line of input contains an integer *m* (1<=≤<=*m*<=≤<=100<=000) — the required number of trailing zeroes in factorial. | First print *k* — the number of values of *n* such that the factorial of *n* ends with *m* zeroes. Then print these *k* integers in increasing order. | [
"1\n",
"5\n"
] | [
"5\n5 6 7 8 9 ",
"0"
] | The factorial of *n* is equal to the product of all integers from 1 to *n* inclusive, that is *n*! = 1·2·3·...·*n*.
In the first sample, 5! = 120, 6! = 720, 7! = 5040, 8! = 40320 and 9! = 362880. | 500 | [
{
"input": "1",
"output": "5\n5 6 7 8 9 "
},
{
"input": "5",
"output": "0"
},
{
"input": "2",
"output": "5\n10 11 12 13 14 "
},
{
"input": "3",
"output": "5\n15 16 17 18 19 "
},
{
"input": "7",
"output": "5\n30 31 32 33 34 "
},
{
"input": "12",
"ou... | 1,456,508,116 | 1,215 | Python 3 | RUNTIME_ERROR | PRETESTS | 1 | 46 | 0 | m=int(input())
i=1
op=[]
while i<=5*(m+1):
j=1
ans=0
while 5**j<=i:
ans+=int(i/(5**j))
j+=1
if ans==m:
op.append(i)
i+=1
else:
i+=1
print(len(op))
for i in range(len(op)-1):
print(op[i],end=' ')
print(op[-1])
| Title: A Trivial Problem
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mr. Santa asks all the great programmers of the world to solve a trivial problem. He gives them an integer *m* and asks for the number of positive integers *n*, such that the factorial of *n* ends with exactly *m* zer... | ```python
m=int(input())
i=1
op=[]
while i<=5*(m+1):
j=1
ans=0
while 5**j<=i:
ans+=int(i/(5**j))
j+=1
if ans==m:
op.append(i)
i+=1
else:
i+=1
print(len(op))
for i in range(len(op)-1):
print(op[i],end=' ')
print(op[-1])
``` | -1 | |
208 | A | Dubstep | PROGRAMMING | 900 | [
"strings"
] | null | null | Vasya works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance. Recently, he has decided to take a couple of old songs and make dubstep remixes from them.
Let's assume that a song consists of some number of words. To make the dubstep remix of this song, Vasya inserts a certain nu... | The input consists of a single non-empty string, consisting only of uppercase English letters, the string's length doesn't exceed 200 characters. It is guaranteed that before Vasya remixed the song, no word contained substring "WUB" in it; Vasya didn't change the word order. It is also guaranteed that initially the son... | Print the words of the initial song that Vasya used to make a dubsteb remix. Separate the words with a space. | [
"WUBWUBABCWUB\n",
"WUBWEWUBAREWUBWUBTHEWUBCHAMPIONSWUBMYWUBFRIENDWUB\n"
] | [
"ABC ",
"WE ARE THE CHAMPIONS MY FRIEND "
] | In the first sample: "WUBWUBABCWUB" = "WUB" + "WUB" + "ABC" + "WUB". That means that the song originally consisted of a single word "ABC", and all words "WUB" were added by Vasya.
In the second sample Vasya added a single word "WUB" between all neighbouring words, in the beginning and in the end, except for words "ARE... | 500 | [
{
"input": "WUBWUBABCWUB",
"output": "ABC "
},
{
"input": "WUBWEWUBAREWUBWUBTHEWUBCHAMPIONSWUBMYWUBFRIENDWUB",
"output": "WE ARE THE CHAMPIONS MY FRIEND "
},
{
"input": "WUBWUBWUBSR",
"output": "SR "
},
{
"input": "RWUBWUBWUBLWUB",
"output": "R L "
},
{
"input": "... | 1,679,212,022 | 2,147,483,647 | PyPy 3-64 | OK | TESTS | 71 | 156 | 2,150,400 | import re
s = input()
print(re.sub(' +', ' ', s.replace('WUB', ' '))) | Title: Dubstep
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Vasya works as a DJ in the best Berland nightclub, and he often uses dubstep music in his performance. Recently, he has decided to take a couple of old songs and make dubstep remixes from them.
Let's assume that a song consist... | ```python
import re
s = input()
print(re.sub(' +', ' ', s.replace('WUB', ' ')))
``` | 3 | |
112 | A | Petya and Strings | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Petya and Strings | 2 | 256 | Little Petya loves presents. His mum bought him two strings of the same size for his birthday. The strings consist of uppercase and lowercase Latin letters. Now Petya wants to compare those two strings lexicographically. The letters' case does not matter, that is an uppercase letter is considered equivalent to the corr... | Each of the first two lines contains a bought string. The strings' lengths range from 1 to 100 inclusive. It is guaranteed that the strings are of the same length and also consist of uppercase and lowercase Latin letters. | If the first string is less than the second one, print "-1". If the second string is less than the first one, print "1". If the strings are equal, print "0". Note that the letters' case is not taken into consideration when the strings are compared. | [
"aaaa\naaaA\n",
"abs\nAbz\n",
"abcdefg\nAbCdEfF\n"
] | [
"0\n",
"-1\n",
"1\n"
] | If you want more formal information about the lexicographical order (also known as the "dictionary order" or "alphabetical order"), you can visit the following site:
- http://en.wikipedia.org/wiki/Lexicographical_order | 500 | [
{
"input": "aaaa\naaaA",
"output": "0"
},
{
"input": "abs\nAbz",
"output": "-1"
},
{
"input": "abcdefg\nAbCdEfF",
"output": "1"
},
{
"input": "asadasdasd\nasdwasdawd",
"output": "-1"
},
{
"input": "aslkjlkasdd\nasdlkjdajwi",
"output": "1"
},
{
"input":... | 1,697,842,433 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 62 | 0 | result = 0
a,b = input(), input()
if a > b:
print(1)
elif a < b:
print(-1)
else:
print(0)
| Title: Petya and Strings
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
Little Petya loves presents. His mum bought him two strings of the same size for his birthday. The strings consist of uppercase and lowercase Latin letters. Now Petya wants to compare those two strings lexicographically. ... | ```python
result = 0
a,b = input(), input()
if a > b:
print(1)
elif a < b:
print(-1)
else:
print(0)
``` | 0 |
581 | A | Vasya the Hipster | PROGRAMMING | 800 | [
"implementation",
"math"
] | null | null | One day Vasya the Hipster decided to count how many socks he had. It turned out that he had *a* red socks and *b* blue socks.
According to the latest fashion, hipsters should wear the socks of different colors: a red one on the left foot, a blue one on the right foot.
Every day Vasya puts on new socks in the morning ... | The single line of the input contains two positive integers *a* and *b* (1<=≤<=*a*,<=*b*<=≤<=100) — the number of red and blue socks that Vasya's got. | Print two space-separated integers — the maximum number of days when Vasya can wear different socks and the number of days when he can wear the same socks until he either runs out of socks or cannot make a single pair from the socks he's got.
Keep in mind that at the end of the day Vasya throws away the socks that he'... | [
"3 1\n",
"2 3\n",
"7 3\n"
] | [
"1 1\n",
"2 0\n",
"3 2\n"
] | In the first sample Vasya can first put on one pair of different socks, after that he has two red socks left to wear on the second day. | 500 | [
{
"input": "3 1",
"output": "1 1"
},
{
"input": "2 3",
"output": "2 0"
},
{
"input": "7 3",
"output": "3 2"
},
{
"input": "100 100",
"output": "100 0"
},
{
"input": "4 10",
"output": "4 3"
},
{
"input": "6 10",
"output": "6 2"
},
{
"input":... | 1,688,118,033 | 2,147,483,647 | Python 3 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | #include <stdio.h>
int main()
{
int a,k,b, t;
scanf("%d %d",&a,&b);
if(a>=b)
{
k = (a-b)/2;
t = b;
}
if(a<=b)
{
k=(b-a)/2;
t = a;
}
printf("%d %d",t,k);
}
| Title: Vasya the Hipster
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One day Vasya the Hipster decided to count how many socks he had. It turned out that he had *a* red socks and *b* blue socks.
According to the latest fashion, hipsters should wear the socks of different colors: a red... | ```python
#include <stdio.h>
int main()
{
int a,k,b, t;
scanf("%d %d",&a,&b);
if(a>=b)
{
k = (a-b)/2;
t = b;
}
if(a<=b)
{
k=(b-a)/2;
t = a;
}
printf("%d %d",t,k);
}
``` | -1 | |
606 | A | Magic Spheres | PROGRAMMING | 1,200 | [
"implementation"
] | null | null | Carl is a beginner magician. He has *a* blue, *b* violet and *c* orange magic spheres. In one move he can transform two spheres of the same color into one sphere of any other color. To make a spell that has never been seen before, he needs at least *x* blue, *y* violet and *z* orange spheres. Can he get them (possible,... | The first line of the input contains three integers *a*, *b* and *c* (0<=≤<=*a*,<=*b*,<=*c*<=≤<=1<=000<=000) — the number of blue, violet and orange spheres that are in the magician's disposal.
The second line of the input contains three integers, *x*, *y* and *z* (0<=≤<=*x*,<=*y*,<=*z*<=≤<=1<=000<=000) — the number o... | If the wizard is able to obtain the required numbers of spheres, print "Yes". Otherwise, print "No". | [
"4 4 0\n2 1 2\n",
"5 6 1\n2 7 2\n",
"3 3 3\n2 2 2\n"
] | [
"Yes\n",
"No\n",
"Yes\n"
] | In the first sample the wizard has 4 blue and 4 violet spheres. In his first action he can turn two blue spheres into one violet one. After that he will have 2 blue and 5 violet spheres. Then he turns 4 violet spheres into 2 orange spheres and he ends up with 2 blue, 1 violet and 2 orange spheres, which is exactly what... | 500 | [
{
"input": "4 4 0\n2 1 2",
"output": "Yes"
},
{
"input": "5 6 1\n2 7 2",
"output": "No"
},
{
"input": "3 3 3\n2 2 2",
"output": "Yes"
},
{
"input": "0 0 0\n0 0 0",
"output": "Yes"
},
{
"input": "0 0 0\n0 0 1",
"output": "No"
},
{
"input": "0 1 0\n0 0 0... | 1,449,678,333 | 1,233 | PyPy 3 | OK | TESTS | 79 | 109 | 0 | def main():
a, b, c = map(int, input().split())
x, y, z = map(int, input().split())
af = a - x
bf = b - y
cf = c - z
q = sorted([af, bf, cf])
if all(x < 0 for x in q):
return False
if all(x >= 0 for x in q):
return True
if q[0] < 0 and q[1] < 0:
return q[2] // 2 >= -q[0] + -q[1]
... | Title: Magic Spheres
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Carl is a beginner magician. He has *a* blue, *b* violet and *c* orange magic spheres. In one move he can transform two spheres of the same color into one sphere of any other color. To make a spell that has never been see... | ```python
def main():
a, b, c = map(int, input().split())
x, y, z = map(int, input().split())
af = a - x
bf = b - y
cf = c - z
q = sorted([af, bf, cf])
if all(x < 0 for x in q):
return False
if all(x >= 0 for x in q):
return True
if q[0] < 0 and q[1] < 0:
return q[2] // 2 >= -q[0] +... | 3 | |
139 | A | Petr and Book | PROGRAMMING | 1,000 | [
"implementation"
] | null | null | One Sunday Petr went to a bookshop and bought a new book on sports programming. The book had exactly *n* pages.
Petr decided to start reading it starting from the next day, that is, from Monday. Petr's got a very tight schedule and for each day of the week he knows how many pages he will be able to read on that day. S... | The first input line contains the single integer *n* (1<=≤<=*n*<=≤<=1000) — the number of pages in the book.
The second line contains seven non-negative space-separated integers that do not exceed 1000 — those integers represent how many pages Petr can read on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and... | Print a single number — the number of the day of the week, when Petr will finish reading the book. The days of the week are numbered starting with one in the natural order: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday. | [
"100\n15 20 20 15 10 30 45\n",
"2\n1 0 0 0 0 0 0\n"
] | [
"6\n",
"1\n"
] | Note to the first sample:
By the end of Monday and therefore, by the beginning of Tuesday Petr has 85 pages left. He has 65 pages left by Wednesday, 45 by Thursday, 30 by Friday, 20 by Saturday and on Saturday Petr finishes reading the book (and he also has time to read 10 pages of something else).
Note to the second... | 500 | [
{
"input": "100\n15 20 20 15 10 30 45",
"output": "6"
},
{
"input": "2\n1 0 0 0 0 0 0",
"output": "1"
},
{
"input": "100\n100 200 100 200 300 400 500",
"output": "1"
},
{
"input": "3\n1 1 1 1 1 1 1",
"output": "3"
},
{
"input": "1\n1 1 1 1 1 1 1",
"output": "1... | 1,665,652,698 | 2,147,483,647 | Python 3 | RUNTIME_ERROR | TESTS | 0 | 60 | 0 | y = int(input())
l_n = list(map(int, input().split()))
n_s = sum(l_n)
while y > n_s:
y -= n_s
while p > 0:
for i in range(len(l_n)):
if l_n[i] >= y:
print(i + 1)
quit()
y -= l_n[i] | Title: Petr and Book
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
One Sunday Petr went to a bookshop and bought a new book on sports programming. The book had exactly *n* pages.
Petr decided to start reading it starting from the next day, that is, from Monday. Petr's got a very tight s... | ```python
y = int(input())
l_n = list(map(int, input().split()))
n_s = sum(l_n)
while y > n_s:
y -= n_s
while p > 0:
for i in range(len(l_n)):
if l_n[i] >= y:
print(i + 1)
quit()
y -= l_n[i]
``` | -1 | |
496 | A | Minimum Difficulty | PROGRAMMING | 900 | [
"brute force",
"implementation",
"math"
] | null | null | Mike is trying rock climbing but he is awful at it.
There are *n* holds on the wall, *i*-th hold is at height *a**i* off the ground. Besides, let the sequence *a**i* increase, that is, *a**i*<=<<=*a**i*<=+<=1 for all *i* from 1 to *n*<=-<=1; we will call such sequence a track. Mike thinks that the track *a*1, ...,... | The first line contains a single integer *n* (3<=≤<=*n*<=≤<=100) — the number of holds.
The next line contains *n* space-separated integers *a**i* (1<=≤<=*a**i*<=≤<=1000), where *a**i* is the height where the hold number *i* hangs. The sequence *a**i* is increasing (i.e. each element except for the first one is strict... | Print a single number — the minimum difficulty of the track after removing a single hold. | [
"3\n1 4 6\n",
"5\n1 2 3 4 5\n",
"5\n1 2 3 7 8\n"
] | [
"5\n",
"2\n",
"4\n"
] | In the first sample you can remove only the second hold, then the sequence looks like (1, 6), the maximum difference of the neighboring elements equals 5.
In the second test after removing every hold the difficulty equals 2.
In the third test you can obtain sequences (1, 3, 7, 8), (1, 2, 7, 8), (1, 2, 3, 8), for whic... | 500 | [
{
"input": "3\n1 4 6",
"output": "5"
},
{
"input": "5\n1 2 3 4 5",
"output": "2"
},
{
"input": "5\n1 2 3 7 8",
"output": "4"
},
{
"input": "3\n1 500 1000",
"output": "999"
},
{
"input": "10\n1 2 3 4 5 6 7 8 9 10",
"output": "2"
},
{
"input": "10\n1 4 9... | 1,418,835,394 | 1,594 | Python 3 | OK | TESTS | 19 | 62 | 0 | import sys
nu = int(sys.stdin.readline())
a=list(map(int,sys.stdin.readline().split()))
r=max(a)
for j in range(1,nu-1):
x=0
b=a[:]
b.remove(a[j])
for i in range(0,nu-2):
x=max(x,b[i+1]-b[i])
r=min(r,x)
print(r) | Title: Minimum Difficulty
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Mike is trying rock climbing but he is awful at it.
There are *n* holds on the wall, *i*-th hold is at height *a**i* off the ground. Besides, let the sequence *a**i* increase, that is, *a**i*<=<<=*a**i*<=+<=1 fo... | ```python
import sys
nu = int(sys.stdin.readline())
a=list(map(int,sys.stdin.readline().split()))
r=max(a)
for j in range(1,nu-1):
x=0
b=a[:]
b.remove(a[j])
for i in range(0,nu-2):
x=max(x,b[i+1]-b[i])
r=min(r,x)
print(r)
``` | 3 | |
41 | A | Translation | PROGRAMMING | 800 | [
"implementation",
"strings"
] | A. Translation | 2 | 256 | The translation from the Berland language into the Birland language is not an easy task. Those languages are very similar: a berlandish word differs from a birlandish word with the same meaning a little: it is spelled (and pronounced) reversely. For example, a Berlandish word code corresponds to a Birlandish word edoc.... | The first line contains word *s*, the second line contains word *t*. The words consist of lowercase Latin letters. The input data do not consist unnecessary spaces. The words are not empty and their lengths do not exceed 100 symbols. | If the word *t* is a word *s*, written reversely, print YES, otherwise print NO. | [
"code\nedoc\n",
"abb\naba\n",
"code\ncode\n"
] | [
"YES\n",
"NO\n",
"NO\n"
] | none | 500 | [
{
"input": "code\nedoc",
"output": "YES"
},
{
"input": "abb\naba",
"output": "NO"
},
{
"input": "code\ncode",
"output": "NO"
},
{
"input": "abacaba\nabacaba",
"output": "YES"
},
{
"input": "q\nq",
"output": "YES"
},
{
"input": "asrgdfngfnmfgnhweratgjkk... | 1,661,594,192 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 0 | 60 | 0 | a = input()
b = input()
n = len(a)
flag = 1
for i in range(len(a)):
if(a[i] == b[n-i-1]):
continue
else:
flag = 0
break
if(flag == 1):
print("Yes")
else:
print("NO") | Title: Translation
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
The translation from the Berland language into the Birland language is not an easy task. Those languages are very similar: a berlandish word differs from a birlandish word with the same meaning a little: it is spelled (and pron... | ```python
a = input()
b = input()
n = len(a)
flag = 1
for i in range(len(a)):
if(a[i] == b[n-i-1]):
continue
else:
flag = 0
break
if(flag == 1):
print("Yes")
else:
print("NO")
``` | 0 |
235 | A | LCM Challenge | PROGRAMMING | 1,600 | [
"number theory"
] | null | null | Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it.
But I also don't want to use many numbers, so I'll choose three positive integers (they don't have to be distinct) which are not greater than *n*. Can you help me to find ... | The first line contains an integer *n* (1<=≤<=*n*<=≤<=106) — the *n* mentioned in the statement. | Print a single integer — the maximum possible LCM of three not necessarily distinct positive integers that are not greater than *n*. | [
"9\n",
"7\n"
] | [
"504\n",
"210\n"
] | The least common multiple of some positive integers is the least positive integer which is multiple for each of them.
The result may become very large, 32-bit integer won't be enough. So using 64-bit integers is recommended.
For the last example, we can chose numbers 7, 6, 5 and the LCM of them is 7·6·5 = 210. It is ... | 500 | [
{
"input": "9",
"output": "504"
},
{
"input": "7",
"output": "210"
},
{
"input": "1",
"output": "1"
},
{
"input": "5",
"output": "60"
},
{
"input": "6",
"output": "60"
},
{
"input": "33",
"output": "32736"
},
{
"input": "21",
"output": ... | 1,683,294,747 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 2 | 62 | 0 | def GCD(m,n):
while(n!=0):
m,n=n,m%n
return m
n=int(input())
l=[i for i in range(1,n+1)]
gcd=0
maxi=0
for i in range(n,1,-1):
gcd=GCD(l[i-1],l[i-2])
gcd=GCD(gcd,l[i-3])
lcm=l[i-1]*l[i-2]*l[i-3]//gcd
maxi=max(maxi,lcm)
print(maxi) | Title: LCM Challenge
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Some days ago, I learned the concept of LCM (least common multiple). I've played with it for several times and I want to make a big number with it.
But I also don't want to use many numbers, so I'll choose three positive... | ```python
def GCD(m,n):
while(n!=0):
m,n=n,m%n
return m
n=int(input())
l=[i for i in range(1,n+1)]
gcd=0
maxi=0
for i in range(n,1,-1):
gcd=GCD(l[i-1],l[i-2])
gcd=GCD(gcd,l[i-3])
lcm=l[i-1]*l[i-2]*l[i-3]//gcd
maxi=max(maxi,lcm)
print(maxi)
``` | 0 | |
814 | C | An impassioned circulation of affection | PROGRAMMING | 1,600 | [
"brute force",
"dp",
"strings",
"two pointers"
] | null | null | Nadeko's birthday is approaching! As she decorated the room for the party, a long garland of Dianthus-shaped paper pieces was placed on a prominent part of the wall. Brother Koyomi will like it!
Still unsatisfied with the garland, Nadeko decided to polish it again. The garland has *n* pieces numbered from 1 to *n* fro... | The first line of input contains a positive integer *n* (1<=≤<=*n*<=≤<=1<=500) — the length of the garland.
The second line contains *n* lowercase English letters *s*1*s*2... *s**n* as a string — the initial colours of paper pieces on the garland.
The third line contains a positive integer *q* (1<=≤<=*q*<=≤<=200<=000... | Output *q* lines: for each work plan, output one line containing an integer — the largest Koyomity achievable after repainting the garland according to it. | [
"6\nkoyomi\n3\n1 o\n4 o\n4 m\n",
"15\nyamatonadeshiko\n10\n1 a\n2 a\n3 a\n4 a\n5 a\n1 b\n2 b\n3 b\n4 b\n5 b\n",
"10\naaaaaaaaaa\n2\n10 b\n10 z\n"
] | [
"3\n6\n5\n",
"3\n4\n5\n7\n8\n1\n2\n3\n4\n5\n",
"10\n10\n"
] | In the first sample, there are three plans:
- In the first plan, at most 1 piece can be repainted. Repainting the "y" piece to become "o" results in "kooomi", whose Koyomity of 3 is the best achievable; - In the second plan, at most 4 pieces can be repainted, and "oooooo" results in a Koyomity of 6; - In the third... | 1,750 | [
{
"input": "6\nkoyomi\n3\n1 o\n4 o\n4 m",
"output": "3\n6\n5"
},
{
"input": "15\nyamatonadeshiko\n10\n1 a\n2 a\n3 a\n4 a\n5 a\n1 b\n2 b\n3 b\n4 b\n5 b",
"output": "3\n4\n5\n7\n8\n1\n2\n3\n4\n5"
},
{
"input": "10\naaaaaaaaaa\n2\n10 b\n10 z",
"output": "10\n10"
},
{
"input": "1... | 1,670,690,343 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 8 | 2,000 | 0 | def work(m, c):
# print(n)
# print(s)
# print(q)
# print(m, c)
# is consecutive number of c possible given m
def e(consecutive_compliment):
consecutive = n - consecutive_compliment
i, j = 0, 0
c_count = 0
while i < n:
# sliding window
... | Title: An impassioned circulation of affection
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Nadeko's birthday is approaching! As she decorated the room for the party, a long garland of Dianthus-shaped paper pieces was placed on a prominent part of the wall. Brother Koyomi will like it!
... | ```python
def work(m, c):
# print(n)
# print(s)
# print(q)
# print(m, c)
# is consecutive number of c possible given m
def e(consecutive_compliment):
consecutive = n - consecutive_compliment
i, j = 0, 0
c_count = 0
while i < n:
# sliding w... | 0 | |
99 | A | Help Far Away Kingdom | PROGRAMMING | 800 | [
"strings"
] | A. Help Far Away Kingdom | 2 | 256 | In a far away kingdom lived the King, the Prince, the Shoemaker, the Dressmaker and many other citizens. They lived happily until great trouble came into the Kingdom. The ACMers settled there.
Most damage those strange creatures inflicted upon the kingdom was that they loved high precision numbers. As a result, the Ki... | The first line contains a single number to round up — the integer part (a non-empty set of decimal digits that do not start with 0 — with the exception of a case when the set consists of a single digit — in this case 0 can go first), then follows character «.» (a dot), and then follows the fractional part (any non-empt... | If the last number of the integer part is not equal to 9, print the rounded-up number without leading zeroes. Otherwise, print the message "GOTO Vasilisa." (without the quotes). | [
"0.0\n",
"1.49\n",
"1.50\n",
"2.71828182845904523536\n",
"3.14159265358979323846\n",
"12345678901234567890.1\n",
"123456789123456789.999\n"
] | [
"0",
"1",
"2",
"3",
"3",
"12345678901234567890",
"GOTO Vasilisa."
] | none | 500 | [
{
"input": "0.0",
"output": "0"
},
{
"input": "1.49",
"output": "1"
},
{
"input": "1.50",
"output": "2"
},
{
"input": "2.71828182845904523536",
"output": "3"
},
{
"input": "3.14159265358979323846",
"output": "3"
},
{
"input": "12345678901234567890.1",
... | 1,601,599,966 | 2,147,483,647 | Python 3 | WRONG_ANSWER | TESTS | 5 | 218 | 0 | a=input().strip()
x,y=a.split('.')
if x[-1]=='9':
print("GOTO Vasilisa")
else:
a=float(a)
print(round(a))
| Title: Help Far Away Kingdom
Time Limit: 2 seconds
Memory Limit: 256 megabytes
Problem Description:
In a far away kingdom lived the King, the Prince, the Shoemaker, the Dressmaker and many other citizens. They lived happily until great trouble came into the Kingdom. The ACMers settled there.
Most damage those stran... | ```python
a=input().strip()
x,y=a.split('.')
if x[-1]=='9':
print("GOTO Vasilisa")
else:
a=float(a)
print(round(a))
``` | 0 |
12 | C | Fruits | PROGRAMMING | 1,100 | [
"greedy",
"implementation",
"sortings"
] | C. Fruits | 1 | 256 | The spring is coming and it means that a lot of fruits appear on the counters. One sunny day little boy Valera decided to go shopping. He made a list of *m* fruits he wanted to buy. If Valera want to buy more than one fruit of some kind, he includes it into the list several times.
When he came to the fruit stall of A... | The first line of the input contains two integer number *n* and *m* (1<=≤<=*n*,<=*m*<=≤<=100) — the number of price tags (which is equal to the number of different kinds of fruits that Ashot sells) and the number of items in Valera's list. The second line contains *n* space-separated positive integer numbers. Each of t... | Print two numbers *a* and *b* (*a*<=≤<=*b*) — the minimum and the maximum possible sum which Valera may need to buy all fruits from his list. | [
"5 3\n4 2 1 10 5\napple\norange\nmango\n",
"6 5\n3 5 1 6 8 1\npeach\ngrapefruit\nbanana\norange\norange\n"
] | [
"7 19\n",
"11 30\n"
] | none | 0 | [
{
"input": "5 3\n4 2 1 10 5\napple\norange\nmango",
"output": "7 19"
},
{
"input": "6 5\n3 5 1 6 8 1\npeach\ngrapefruit\nbanana\norange\norange",
"output": "11 30"
},
{
"input": "2 2\n91 82\neiiofpfpmemlakcystpun\nmcnzeiiofpfpmemlakcystpunfl",
"output": "173 173"
},
{
"input"... | 1,592,149,267 | 2,147,483,647 | PyPy 3 | OK | TESTS | 25 | 155 | 0 | from itertools import groupby
fruits = []
fruit_qty = []
answer_min = 0
answer_max = 0
price_tags, items = list(map(int, input().split()))
price = sorted(list(map(int, input().split())))
for _ in range(items):
fruits.append(str(input()))
fruits.sort()
fruit_qty = [len(list(group)) for key, group in ... | Title: Fruits
Time Limit: 1 seconds
Memory Limit: 256 megabytes
Problem Description:
The spring is coming and it means that a lot of fruits appear on the counters. One sunny day little boy Valera decided to go shopping. He made a list of *m* fruits he wanted to buy. If Valera want to buy more than one fruit of some ... | ```python
from itertools import groupby
fruits = []
fruit_qty = []
answer_min = 0
answer_max = 0
price_tags, items = list(map(int, input().split()))
price = sorted(list(map(int, input().split())))
for _ in range(items):
fruits.append(str(input()))
fruits.sort()
fruit_qty = [len(list(group)) for key,... | 3.9225 |
479 | A | Expression | PROGRAMMING | 1,000 | [
"brute force",
"math"
] | null | null | Petya studies in a school and he adores Maths. His class has been studying arithmetic expressions. On the last class the teacher wrote three positive integers *a*, *b*, *c* on the blackboard. The task was to insert signs of operations '+' and '*', and probably brackets between the numbers so that the value of the resul... | The input contains three integers *a*, *b* and *c*, each on a single line (1<=≤<=*a*,<=*b*,<=*c*<=≤<=10). | Print the maximum value of the expression that you can obtain. | [
"1\n2\n3\n",
"2\n10\n3\n"
] | [
"9\n",
"60\n"
] | none | 500 | [
{
"input": "1\n2\n3",
"output": "9"
},
{
"input": "2\n10\n3",
"output": "60"
},
{
"input": "1\n1\n1",
"output": "3"
},
{
"input": "1\n2\n1",
"output": "4"
},
{
"input": "10\n10\n10",
"output": "1000"
},
{
"input": "5\n1\n3",
"output": "20"
},
{... | 1,697,794,164 | 2,147,483,647 | PyPy 3-64 | COMPILATION_ERROR | TESTS | 0 | 0 | 0 | a=int(input())
b=int(input())
c=int(input())
if a==1 and b==1 and c==1:
r=a+b+c
elif a==1 and b==1:
r=(a+b)*c
elif a==1 and c==1:
r=a+b+c
elif b==1 and c==1:
r= a*(b+c)
else:
r=a*b*c
print (r | Title: Expression
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
Petya studies in a school and he adores Maths. His class has been studying arithmetic expressions. On the last class the teacher wrote three positive integers *a*, *b*, *c* on the blackboard. The task was to insert signs of ... | ```python
a=int(input())
b=int(input())
c=int(input())
if a==1 and b==1 and c==1:
r=a+b+c
elif a==1 and b==1:
r=(a+b)*c
elif a==1 and c==1:
r=a+b+c
elif b==1 and c==1:
r= a*(b+c)
else:
r=a*b*c
print (r
``` | -1 | |
742 | A | Arpa’s hard exam and Mehrdad’s naive cheat | PROGRAMMING | 1,000 | [
"implementation",
"math",
"number theory"
] | null | null | There exists an island called Arpa’s land, some beautiful girls live there, as ugly ones do.
Mehrdad wants to become minister of Arpa’s land. Arpa has prepared an exam. Exam has only one question, given *n*, print the last digit of 1378*n*.
Mehrdad has become quite confused and wants you to help him. Please help, al... | The single line of input contains one integer *n* (0<=<=≤<=<=*n*<=<=≤<=<=109). | Print single integer — the last digit of 1378*n*. | [
"1\n",
"2\n"
] | [
"8",
"4"
] | In the first example, last digit of 1378<sup class="upper-index">1</sup> = 1378 is 8.
In the second example, last digit of 1378<sup class="upper-index">2</sup> = 1378·1378 = 1898884 is 4. | 500 | [
{
"input": "1",
"output": "8"
},
{
"input": "2",
"output": "4"
},
{
"input": "1000",
"output": "6"
},
{
"input": "3",
"output": "2"
},
{
"input": "4",
"output": "6"
},
{
"input": "1000000000",
"output": "6"
},
{
"input": "5",
"output": ... | 1,644,764,837 | 2,147,483,647 | Python 3 | TIME_LIMIT_EXCEEDED | TESTS | 5 | 1,000 | 2,764,800 | n = int(input())
x = 1378**n
print(str(x)[-1]) | Title: Arpa’s hard exam and Mehrdad’s naive cheat
Time Limit: None seconds
Memory Limit: None megabytes
Problem Description:
There exists an island called Arpa’s land, some beautiful girls live there, as ugly ones do.
Mehrdad wants to become minister of Arpa’s land. Arpa has prepared an exam. Exam has only one ques... | ```python
n = int(input())
x = 1378**n
print(str(x)[-1])
``` | 0 |
Subsets and Splits
Successful Python Submissions
Retrieves all records from the train dataset where the verdict is 'OK', providing basic filtering but limited analytical value.
SQL Console for MatrixStudio/Codeforces-Python-Submissions
Retrieves records of users with a rating of 1600 or higher and a verdict of 'OK', providing basic filtering but limited analytical value.
SQL Console for MatrixStudio/Codeforces-Python-Submissions
Counts the number of entries with a rating above 2000 and a verdict of 'OK', providing basic filtering but limited analytical value.
SQL Console for MatrixStudio/Codeforces-Python-Submissions
Counts the number of entries with a 'OK' verdict, providing a basic overview of a specific category within the dataset.