Welcome to SharifdotG's CodeVault, the ultimate competitive programming repository for developers worldwide! 🧑💻 From beginners taking their first steps to experienced programmers preparing for contests, this vault offers 1300+ meticulously crafted solutions across 25+ prestigious Online Judges, covering everything from fundamental algorithms to advanced data structures. 🌐
SharifdotG's CodeVault is more than just a collection of solutions—it's a comprehensive learning ecosystem designed to accelerate your journey in competitive programming and software development. Each solution is carefully optimized for both performance and readability, accompanied by detailed explanations that help you understand not just the "how" but the "why" behind every approach.
- 1300+ Problems Solved across multiple difficulty levels 🧩
- 25+ Elite Online Judges from around the globe 🌍
- 7 Programming Languages for diverse learning approaches 💻
- 3800+ Source Files with comprehensive documentation 📚
- Detailed README Guides for every solution with complexity analysis 📖
- Educational Progression from fundamentals to advanced concepts 🎓
| Language | Files | Percentage | Primary Use Cases |
|---|---|---|---|
 C++ |
1,230 | 32.0% | Competitive Programming, Performance-Critical Solutions |
 C |
549 | 14.3% | System Programming, Low-Level Algorithms |
 Python |
568 | 14.8% | Rapid Prototyping, Educational Examples |
 Rust |
379 | 9.9% | Memory-Safe High-Performance Code |
 JavaScript |
379 | 9.9% | Web Development, Algorithm Visualization |
 C# |
379 | 9.9% | .NET Development, Enterprise Solutions |
 Java |
358 | 9.3% | Object-Oriented Approaches, Platform Independence |
Each programming language offers unique advantages for different types of problems:
- C++: The gold standard for competitive programming with excellent STL support
- Python: Perfect for quick prototyping and mathematical computations
- Java: Excellent for object-oriented solutions and enterprise-level thinking
- Rust: Modern systems programming with memory safety guarantees
- C: Essential for understanding low-level programming concepts
- JavaScript: Great for web-based algorithm visualization and modern development
- C#: Powerful for .NET ecosystem and enterprise applications
- 🌍 Global Coverage: Solutions from 25+ prestigious online judges spanning 4 continents, including Codeforces, CodeChef, AtCoder, Kattis, and many more
- 🔥 Multi-Language Mastery: 7 programming languages providing diverse problem-solving approaches and learning opportunities
- 📚 Educational Excellence: Every solution includes comprehensive documentation with:
- Detailed algorithm explanations and complexity analysis
- Step-by-step code walkthroughs with comments
- Multiple test cases and edge case handling
- Real-world applications and use cases
- Troubleshooting guides and optimization tips
- 🎯 Quality Assurance: Clean, efficient, and well-commented code that's optimized for both performance and readability
- 🔄 Regular Updates: Continuous addition of new problems, solutions, and improved documentation
- 📊 Structured Learning: Organized progression from fundamental concepts to advanced algorithms
- 🏆 Contest Preparation: Ideal for competitive programming, technical interviews, and skill development
- 📝 Fundamentals Track: Start with basic I/O, arithmetic operations, and simple algorithms
- 🔢 Data Structures Path: Arrays, linked lists, stacks, queues, trees, and graphs
- 🧮 Algorithms Journey: Sorting, searching, dynamic programming, and graph algorithms
- 🏅 Contest Preparation: Platform-specific problem patterns and optimization techniques
- 💼 Interview Ready: Common technical interview questions and problem-solving strategies
- Start with beginner problems in any judge folder (e.g., Beecrowd, Codeforces, AtCoder)
- Begin with Hello World and progress through Basic I/O, Arithmetic Operations
- Choose your preferred programming language (C++ recommended for competitive programming)
- Read the detailed README guides for each problem
- Explore Codeforces problems organized by difficulty rating (800, 900, 1000+)
- Practice with Kattis for diverse problem types
- Challenge yourself with AtCoder and CSES advanced algorithms
- Focus on LeetCode style problems
- Study HackerRank coding challenges
- Practice data structure implementations in Beecrowd, Codeforces, or CSES
Here’s a overview of the Online Judges currently supported by SharifdotG's CodeVault. With each judge, you can find solutions categorized by problem types, difficulty levels, and programming languages. 🏆 By solving problems from these various judges, you can level up your skills in algorithm design, data structures, and competitive programming!
| # | Online Judge | Logo | Origin | My Solutions | Languages | Total Solved |
|---|---|---|---|---|---|---|
| 1 | Advent of Code |  |
🇺🇸 USA | Solutions |  |
0 |
| 2 | AIZU Online Judge |  |
🇯🇵 Japan | Solutions | |
42 |
| 3 | AtCoder |  |
🇯🇵 Japan | Solutions | |
20 |
| 4 | Beecrowd |  |
🇧🇷 Brazil | Solutions |    |
217 |
| 5 | CodeChef |  |
🇮🇳 India | Solutions | |
112 |
| 6 | Codeforces |  |
🇷🇺 Russia | Solutions | |
280 |
| 7 | CSES |  |
🇫🇮 Finland | Solutions | |
14 |
| 8 | Dimik OJ |  |
🇧🇩 Bangladesh | Solutions | |
52 (Done!) |
| 9 | DMOJ |  |
🇨🇦 Canada | Solutions | |
4 |
| 10 | e-olymp |  |
🇺🇦 Ukraine | Solutions | |
2 |
| 11 | HackerEarth |  |
🇮🇳 India | Solutions | |
0 |
| 12 | HackerRank |  |
🇺🇸 USA | Solutions | |
98 |
| 13 | Kattis |  |
🇮🇸 Iceland, 🇸🇪 Sweden & 🇺🇸 USA | Solutions | |
265 |
| 14 | LeetCode |  |
USA | Solutions | |
1 |
| 15 | LightOJ |  |
🇧🇩 Bangladesh | Solutions | |
62 |
| 16 | MBSTU OJ |  |
🇧🇩 Bangladesh | Solutions | |
4 |
| 17 | Project Euler |  |
🇺🇸 USA | Solutions | |
3 |
| 18 | SPOJ |  |
🇵🇱 Poland | Solutions | |
3 |
| 19 | Timus Online Judge |  |
🇷🇺 Russia | Solutions | |
17 |
| 20 | TopCoder |  |
🇺🇸 USA | Solutions | |
0 |
| 21 | Toph |  |
🇧🇩 Bangladesh | Solutions | |
76 |
| 23 | USACO | 
- 🧹 Major Cleanup: Removed language-specific folders, redundant README files, and unnecessary source files for a cleaner, flatter structure
- �️ Simplified Organization: All source files are now directly under their problem folders—no more language subfolders
- 🗑️ Removed Redundancy: Deleted all almost-empty template files, main.c, main.py, and language folders (C, C++, Java, Python, Rust, JavaScript, C#, etc.)
- � Fewer Folders: Reduced folder count for easier navigation and maintenance
- 📉 Leaner Codebase: Only meaningful source files remain—no more boilerplate or placeholder code
- 📈 Repository Growth: Still over 1300+ problems and 25+ online judges
- 🔧 Code Quality: Maintained high standards for code clarity and documentation
- Total Source Files: Significantly reduced (lean and meaningful only)
- Programming Languages: C++, Python, C, Java (others removed for clarity)
- Online Judges: 25+ platforms
- Documentation Files: Only the main README remains for simplicity
- Repository Directories: Streamlined and minimal
- 1300+ Problems Achieved
- 3,842 source files across 7 programming languages
- 134 comprehensive README files
- Added 17 new Online Judges
- Improved README structure
- Reached 1000+ Problems milestone
- Enhanced documentation
- Initial release with 7 Online Judges
- 250+ Problems as starting foundation
- Repository structure and organization established
- 🟢 Beginner (800-1000): ~40% - Perfect for learning fundamentals
- 🟡 Intermediate (1000-1500): ~35% - Building problem-solving skills
- 🟠 Advanced (1500-2000): ~20% - Competitive programming level
- 🔴 Expert (2000+): ~5% - Contest mastery and advanced algorithms
- Algorithmic Challenges: Codeforces, AtCoder, CodeChef
- Educational Content: Beecrowd
- Interview Preparation: HackerRank, LeetCode
- Mathematical Programming: Project Euler, mathematical contests
- Contest Archives: UVa, Kattis, SPOJ
Join our growing community of problem solvers! SharifdotG's CodeVault welcomes contributions from developers worldwide. Whether you're fixing bugs, adding new solutions, or improving documentation, your contributions make this repository better for everyone.
- New Solutions: Solve problems in additional programming languages
- Algorithm Optimization: Improve existing solutions for better performance
- Bug Fixes: Identify and fix issues in current implementations
- Code Reviews: Help maintain code quality and consistency
- README Improvements: Enhance problem explanations and tutorials
- Complexity Analysis: Add time/space complexity analysis to solutions
- Test Cases: Contribute additional test cases and edge cases
- Translations: Help translate documentation to other languages
- Repository Structure: Improve folder organization and navigation
- Automation: Create scripts for testing and validation
- Templates: Develop consistent templates for new problems
- Search & Indexing: Enhance discoverability of solutions
- Clean Code: Write readable, well-commented code
- Consistent Style: Follow existing code formatting conventions
- Multiple Languages: Solutions in C++, Python, Java, or other supported languages
- Performance: Optimize for both time and space complexity when possible
- README Files: Each solution should include a comprehensive README with:
- Problem description and constraints
- Algorithm explanation and approach
- Complexity analysis (time/space)
- Example input/output cases
- Tips and troubleshooting guide
- 🍴 Fork the repository to your GitHub account
- 🌿 Create a new branch:
git checkout -b feature/problem-name - 💻 Code your solution following the established structure
- 📝 Document your approach with detailed README
- 🧪 Test your solution with multiple test cases
- 📤 Submit a pull request with descriptive commit messages
Contributors will be recognized in several ways:
- 📜 Contributors List: Featured in repository acknowledgments
- 🌟 GitHub Stats: Contribution history and impact tracking
- 🎖️ Special Mentions: Outstanding contributions highlighted in updates
- 📈 Progress Tracking: Personal contribution statistics and milestones
- 🤝 Respectful Communication: Maintain professional and friendly interactions
- 🎓 Learning Focus: Help others learn and grow through constructive feedback
- 📊 Quality Over Quantity: Focus on well-documented, high-quality solutions
- 🌍 Inclusive Environment: Welcome contributors from all backgrounds and skill levels
SharifdotG's CodeVault is designed with one mission: To make problem-solving fun, accessible, and effective for everyone! We believe that quality education in algorithms and data structures should be freely available to all developers, regardless of their background or experience level.
- 📚 Educational Excellence: Become the go-to resource for learning competitive programming
- 🌍 Global Accessibility: Provide solutions and explanations in multiple languages
- 🚀 Career Development: Help developers excel in technical interviews and competitions
- 🤝 Community Building: Foster a supportive learning environment for programmers worldwide
- Quality: Every solution is carefully crafted and thoroughly documented
- Education: Focus on teaching concepts, not just providing answers
- Accessibility: Make complex algorithms understandable for learners
- Diversity: Support multiple programming languages and problem-solving approaches
- Innovation: Continuously improve and adapt to modern programming practices
Join our vibrant community of problem solvers and algorithmic thinkers! Whether you have questions, suggestions, or just want to share your coding journey, we'd love to hear from you.
📧 Email: sharifmdyousuf007@gmail.com | � Discussions: GitHub Discussions
- 💡 Questions & Help: Open an issue for technical questions or solution discussions
- 🎯 Feature Requests: Suggest new online judges or repository improvements
- 📚 Study Groups: Connect with fellow competitive programmers
- 🏆 Contests: Stay updated on upcoming programming contests and events
- 📖 Learning Resources: Share and discover additional learning materials
Whether you're a beginner taking your first steps in programming or an experienced developer preparing for competitions, SharifdotG's CodeVault has something for everyone.
🎯 Ready to begin? Choose your path:
Start with Fundamentals in any judge folder (e.g., Beecrowd, Codeforces, AtCoder) | 🏆 Challenge Yourself | � Explore All Judges
⭐ Don't forget to star this repository if you find it helpful!
"The best way to learn programming is by solving problems. The best way to master it is by solving them well."
© 2025 SharifdotG's CodeVault | Version 0.4.0 | Made with ❤️ for the global programming community