CF Tracker

A full-stack web app to track and improve your Codeforces competitive programming performance.

Features

• Rating history graph across all contests with rank boundary markers
• Contest history with rank, rating delta, and per-contest solved/missed problems
• Weak tag analysis based on wrong answer frequency
• Personalized problem recommendations near your current rating
• Upsolve tracker — lists all missed contest problems with checkbox progress (persisted locally)
• JWT-based auth with per-user CF handle storage

Tech Stack

Frontend: React, Recharts, Vite — deployed on Vercel
Backend: Node.js, Express, Prisma, PostgreSQL, JWT — deployed on Render

Live Demo

cf-tracker-app.vercel.app

Usage

1. Sign up and log in
2. Enter your Codeforces handle
3. View your rating graph, weak tags, and problem recommendations
4. Browse contest history with expandable solved/missed breakdowns
5. Use the Upsolve Tracker to work through problems you missed during contests

Author

Ankit Ram | CF: codecrusader69 | GitHub: Ankitdotraider