Codeforces Problem Selector

A modern, interactive web application that helps competitive programmers discover random Codeforces problems based on their preferred difficulty levels and topics. Built with Next.js, TypeScript, and Tailwind CSS.

🚀 Features

• Smart Problem Selection: Get 5 random problems matching your criteria
• Difficulty Range Filtering: Select problems from 800 to 3500 rating
• Topic-Based Filtering: Filter by 30+ problem topics (greedy, dp, graphs, etc.)
• Official Codeforces Integration: Uses the official Codeforces API
• Beautiful UI: Modern glassmorphism design with Codeforces color scheme
• Responsive Design: Works perfectly on desktop and mobile devices
• Real-time Validation: Form validation and error handling
• Direct Problem Links: One-click access to problems on Codeforces

🎯 How It Works

1. Select Topic (Optional): Choose from 30+ problem topics or leave as "All Topics"
2. Set Difficulty Range: Pick starting and ending difficulty ratings
3. Generate Problems: Click to get 5 random problems matching your criteria
4. Solve & Improve: Click on any problem to open it directly on Codeforces

🛠️ Tech Stack

• Framework: Next.js 14.2.6
• Language: TypeScript
• Styling: Tailwind CSS
• API: Codeforces Problemset API
• Deployment: Vercel-ready

🚀 Getting Started

Prerequisites

• Node.js 18+
• npm, yarn, pnpm, or bun

Installation

1. Clone the repository

   git clone <repository-url>
   cd codeforces-problem-selector

2. Install dependencies

   npm install
   # or
   yarn install
   # or
   pnpm install
   # or
   bun install

3. Run the development server

   npm run dev
   # or
   yarn dev
   # or
   pnpm dev
   # or
   bun dev

4. Open your browser Navigate to http://localhost:3000

🎯 Available Topics

The app supports filtering by these problem topics:

• 2-sat, binary search, bitmasks, brute force
• combinatorics, constructive algorithms
• data structures, dfs and similar, divide and conquer
• dp, dsu, expression parsing, fft, flow
• games, geometry, graph matchings, graphs
• greedy, hashing, implementation, interactive
• math, matrices, number theory, probabilities
• shortest paths, sortings, strings
• ternary search, trees, two pointers

🔧 API Integration

The application integrates with the Codeforces Problemset API to fetch problem data in real-time.

🚀 Deployment

The easiest way to deploy is using Vercel:

1. Push your code to GitHub
2. Import your repository to Vercel
3. Deploy with zero configuration

👨‍💻 Author

Bikash Kumar Yadav

Made with ❤️ for the competitive programming community.

Happy Coding! 🚀