Codeforces is an online competitive programming platform that hosts contests for programmers of all skill levels. It allows users to solve algorithmic problems and submit their solutions in various programming languages. The platform features a rating system that ranks participants based on their performance in contests. In addition to contests, Codeforces offers a vast archive of problems for practice, enabling users to improve their coding skills. The community is active, with forums for discussion and collaboration, making it a valuable resource for both beginners and experienced programmers looking to enhance their abilities.