RivalCF — Compare Codeforces Progress With Your Friends
Live: https://rival-cf.vercel.app/ GitHub: https://github.com/MJ5aif/RivalCF
I built RivalCF, a fast and visual tool that compares which Codeforces problems multiple users have solved. Great for rivals, practice groups, and teams who want to track progress together.
Made entirely with GitHub Copilot — I did not manually write a single line of code. The project is based on and inspired by my senior brother Abdullah Vai’s tool: https://cftracker2.netlify.app/ (All problems were collected from there.) His Codeforces handle: oweMeEternity
Key Features
- Multi-user comparison with a unique color for each user
- 4700+ problems (ratings 1600–3000)
- Problems sorted by statement length (quickly find short problems)
- Rating and tag filters (multi-select)
- Color-coded table showing who solved what
- Live statistics that update instantly with filters
- Matrix-style UI with smooth animations
- Direct links to Codeforces problems
- Fast pagination for browsing
Why You Might Like It
- Find problems your rivals solved but you haven't
- Discover problems by specific tags or difficulty
- Identify weak areas and gaps in practice
- Clean and simple interface for quick comparison
Tech Stack
- React
- Vite
- Codeforces API
- Vercel
Try it here: https://rival-cf.vercel.app/ Feedback and suggestions are appreciated.
