Codeforces1000

A collection of solutions to Codeforces problems (≈ rating 800-1100+), solved in C++, Python, and occasionally C.

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📖 Purpose

This repository is a record of my problem-solving journey on Codeforces. It contains solved problems of increasing difficulty, beginning with easier tasks, to build skill in algorithms, data structures, and implementation.

The repo serves as both a personal archive and a resource for others preparing for competitive programming.

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🛠 Languages & Topics

• Languages:

  • C++ (main language)
  • Python (some solutions)
  • C (few solutions)

• Topics covered:

  • Greedy Algorithms
  • Strings & String Manipulation
  • Mathematics & Number Theory
  • Constructive Algorithms
  • Basic Implementation
  • (and more as problems progress)

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🗂 Structure

• Each file or folder corresponds to one Codeforces problem (named/numbered).
• Solutions are organized by problem rather than by topic or difficulty.
• All solutions are written to be compiled and tested locally.

Example structure: 034-Arpa’s_hard_exam_and_Mehrdad’s_naive_cheat/ solution.cpp 050-New_Year_and_Hurry/ main.py ...

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🚀 How to use

1. Clone the repository:

   git clone https://github.com/atef7534/codeforces1000.git
   cd codeforces1000

2. Navigate to a problem folder: cd #034-Arpa’s_hard_exam_and_Mehrdad’s_naive_cheat

3. Compile & run (C++ example): g++ solution.cpp -std=c++17 -O2 -o solution ./solution < input.txt

Or run with Python: python3 main.py < input.txt

🚧 Future Improvements

• Add problem ratings and tags for each solution.

• Group problems by topic (Greedy, Math, Strings, etc.).

• Add explanations / editorials for harder problems.

• Create a test framework for automated checking.

✍️ Author

Atef Yasser GitHub: @atef7534