Codeforces
codeforces.comProgramming competitions and contests, programming community
Dev Toolscompetitive-programmingalgorithmscoding-contestscommunityproblem-solvingprogramming

About
Codeforces is an online platform that hosts competitive programming contests and rounds for programmers of all skill levels. It provides a community where participants can compete in rated and unrated rounds, solve algorithmic problems, and improve their programming skills. The platform supports a global community of competitive programmers with regular contests organized by community members.
Problem
Programmers lack a structured platform to practice algorithmic problem solving and compete with others globally
For
competitive programmers and students interested in algorithmic problem solving
How it works
Users participate in timed online programming contests where they solve algorithmic problems rated by difficulty, earning ratings based on their performance
Business model
free
Status
launched