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README.md

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-license: cc-by-sa-4.0
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+---
+license: cc-by-sa-4.0
+---
+
+# Doocs LeetCode Solutions
+
+[![License: CC-BY-SA-4.0](https://img.shields.io/badge/License-CC--BY--SA--4.0-yellow.svg)](http://creativecommons.org/licenses/by-sa/4.0/)
+[![Hugging Face Datasets](https://img.shields.io/badge/%F0%9F%A4%97%20Hugging%20Face-Datasets-blue)](https://huggingface.co/datasets)
+
+A comprehensive dataset of LeetCode problems and solutions created from the [Doocs LeetCode](https://github.com/doocs/leetcode) repository. This dataset is designed for fine-tuning large language models to understand programming problems and generate code solutions.
+
+## Dataset Description
+
+- **Repository:** [Doocs LeetCode Solutions](https://github.com/doocs/leetcode)
+- **Total Problems:** 2000+
+- **Total Solutions:** 10,000+ (across multiple languages)
+- **Size:** ~60 MB (Parquet format)
+- **Last Updated:** 29 July 2025
+
+## Dataset Structure
+
+### Data Fields
+
+| Field         | Type       | Description                                | Example                          |
+|---------------|------------|--------------------------------------------|----------------------------------|
+| `id`          | `string`   | Problem ID                                 | "0001"                           |
+| `title`       | `string`   | Problem title (slugified)                  | "two-sum"                        |
+| `difficulty`  | `string`   | Problem difficulty level                   | "Easy", "Medium", "Hard"         |
+| `description` | `string`   | Problem description in Markdown            | "Given an array of integers..."  |
+| `tags`        | `string`   | Problem category tags                      | "Array; Hash Table"              |
+| `language`    | `string`   | Programming language of solution           | "Python", "Java", "C++"          |
+| `solution`    | `string`   | Complete solution code                     | "class Solution:\n    def..."    |
+
+### Data Splits
+
+The dataset contains a single comprehensive split containing all problems and solutions:
+
+| Split   | Problems | Solutions |
+|---------|----------|-----------|
+| `train` | 2500+    | 15,000+   |
+
+## How to Use
+
+### Using Hugging Face `datasets` Library
+
+```python
+from datasets import load_dataset
+
+# Load the dataset
+dataset = load_dataset("olegshulyakov/doocs-leetcode-solutions")
+
+# Access a sample
+sample = dataset['train'][0]
+print(f"Problem {sample['id']}: {sample['title']}")
+print(f"Difficulty: {sample['difficulty']}")
+print(f"Tags: {sample['tags']}")
+print(f"Language: {sample['language']}")
+print(f"Solution:\n{sample['solution']}")
+```
+
+## Dataset Creation
+
+### Source Data
+- Collected from [Doocs LeetCode](https://github.com/doocs/leetcode) repository
+- Solutions cover 14+ programming languages
+- Includes problems from LeetCode's entire problem set
+
+### Preprocessing
+1. Repository cloned and processed using our [dataset generator tool](https://github.com/olegshulyakov/leetcode-dataset-generator).
+2. Metadata extracted from README_EN.md files.
+3. Solution files parsed and mapped to programming languages.
+4. Special characters and encoding issues resolved.
+
+## Intended Use
+
+### Primary Use
+- Fine-tuning code generation models
+- Training programming problem-solving AI
+- Educational purposes for learning algorithms
+
+### Possible Uses
+- Benchmarking code generation models
+- Studying programming patterns across languages
+- Analyzing problem difficulty characteristics
+- Creating programming tutorials and examples
+
+### Limitations
+- Solutions may not be optimal (community solutions)
+- Some edge cases might not be covered
+- Problem descriptions may contain markdown/html formatting
+- Limited to problems available in the Doocs repository
+
+## License
+This dataset is licensed under the **CC-BY-SA-4.0 License** - see [LICENSE](LICENSE) file for details.
+
+## Copyright
+The copyright of this project belongs to [Doocs](https://github.com/doocs) community.
+
+## Contact
+For questions or issues regarding the dataset, please open an issue on [GitHub](https://github.com/olegshulyakov/leetcode-dataset-generator/issues).