Codeforces Custom Contests is a Chrome extension designed to help users improve their coding skills through personalized contests. It allows users to create custom contests by selecting the number of problems, difficulty range, and contest duration tailored to their specific goals, whether it’s enhancing speed, problem-solving capabilities, or endurance. This targeted approach to practice aims to make learning more efficient and effective.

In addition to custom contests, this extension offers performance analysis, enabling users to identify which problem tags and difficulty levels are hindering their progress. Users can also track their improvements over time, allowing for adjustments to their training strategies based on real data. Group contests can be organized easily, making it a valuable tool for collaborative learning and growth.