Codeforces contests are competitive programming events hosted on the Codeforces platform, where participants solve algorithmic problems within a set time limit. These contests are categorized into different divisions based on participants' ratings, allowing both beginners and experienced coders to compete at their skill level. Each contest typically consists of several problems that vary in difficulty. Participants submit their solutions, which are automatically evaluated for correctness and efficiency. The scoring system rewards faster submissions and penalizes incorrect attempts, fostering a competitive environment that encourages learning and improvement in programming skills.