A comprehensive collection of solutions to problems from the CSES Problem Set, one of the premier competitive programming practice platforms.
The CSES Problem Set is a curated collection of 200 high-quality competitive programming problems designed for learning and mastering algorithmic problem-solving. The platform continuously evolves with new problems being added regularly.
- Comprehensive Coverage: Problems spanning all major competitive programming topics
- Quality Focus: Each problem is carefully crafted for educational value
- Progressive Difficulty: Problems are organized to build skills systematically
- Multi-language Support: Solutions accepted in C++, Java, Python, and more
├── Introductory Problems/
├── Sorting and Searching/
├── Dynamic Programming/
├── Graph Algorithms/
├── Range Queries/
├── Tree Algorithms/
├── Mathematics/
├── String Algorithms/
└── Geometry/
This repository contains solutions in multiple programming languages:
- C++ - Primary language for competitive programming
- Java - Object-oriented solutions
- Python - Clean, readable implementations
For complete language support details, visit the CSES language guide.
| Category | Problems | Difficulty |
|---|---|---|
| Introductory Problems | 19 | ⭐ Beginner |
| Sorting and Searching | 35 | ⭐⭐ Intermediate |
| Dynamic Programming | 19 | ⭐⭐⭐ Advanced |
| Graph Algorithms | 36 | ⭐⭐⭐ Advanced |
| Range Queries | 19 | ⭐⭐⭐⭐ Expert |
| Tree Algorithms | 16 | ⭐⭐⭐ Advanced |
| Mathematics | 31 | ⭐⭐⭐ Advanced |
| String Algorithms | 17 | ⭐⭐⭐⭐ Expert |
| Geometry | 7 | ⭐⭐⭐⭐ Expert |
-
Clone the repository
git clone https://github.com/yourusername/cses-solutions.git cd cses-solutions -
Navigate to a problem category
cd "Introductory Problems"
-
Compile and run (C++ example)
g++ -o solution solution.cpp ./solution < input.txt
The CSES Problem Set is designed to complement competitive programming textbooks:
- Competitive Programming 4 by Steven Halim
- Guide to Competitive Programming by Antti Laaksonen
- Competitive Programmer's Handbook by Antti Laaksonen
Visit the CSES book recommendations for the complete list.
Each solution includes:
- Problem statement link
- Algorithm explanation
- Time and space complexity
- Clean, commented code
- Test cases (where applicable)
Example:
/*
Problem: Weird Algorithm
Link: https://cses.fi/problemset/task/1068
Time Complexity: O(log n)
Space Complexity: O(1)
Algorithm:
- Follow the Collatz conjecture steps
- If n is even: n = n/2
- If n is odd: n = 3n + 1
- Continue until n = 1
*/CSES features a unique hacking system:
- After solving a problem, view other users' solutions
- Try to find test cases that break their solutions
- Successful hacks improve the test suite for everyone
- All submissions are regraded with new test cases
Track your progress:
- Introductory Problems (0/19)
- Sorting and Searching (0/35)
- Dynamic Programming (0/19)
- Graph Algorithms (0/36)
- Range Queries (0/19)
- Tree Algorithms (0/16)
- Mathematics (0/31)
- String Algorithms (0/17)
- Geometry (0/7)
Contributions are welcome! Please:
- Fork the repository
- Create a feature branch (
git checkout -b feature/new-solution) - Add your solution with proper documentation
- Commit your changes (
git commit -am 'Add solution for Problem XYZ') - Push to the branch (
git push origin feature/new-solution) - Create a Pull Request
- Include problem link and complexity analysis
- Use consistent code formatting
- Add explanatory comments
- Test solutions thoroughly before submitting
This project follows the Creative Commons BY-NC-SA license, consistent with the CSES Problem Set licensing.
Have suggestions for improving this solution repository?
📧 Email: [email protected]
👤 GitHub: @Prahlad-07
- Thanks to Antti Laaksonen and the CSES team for creating this excellent problem set
- Appreciation to the competitive programming community for continuous learning and improvement
⭐ Star this repository if you find it helpful!
🔄 Fork it to create your own solution collection!
Happy Competitive Programming! 🎯