Contests

Coding contests

Solve a set of problems against the clock. The judge checks every submission against hidden tests, the clock is the server's, and standings follow ICPC rules: most problems solved, then least penalty time.

Live now

No contest is running right now.

Upcoming

No contest is scheduled yet. New contests are announced here first.

Past contests

No past contests yet.

How scoring works

• Rank by problems solved. Ties are broken by penalty minutes, then by the time of your last accepted solution.
• Penalty for a solved problem: minutes from the start to your first accepted submission, plus a fixed penalty for each wrong answer, runtime error or time limit before it. Compile errors cost nothing.
• Submission time is recorded by the server when your code arrives, not when judging finishes.
• After a contest ends you can still solve its problems (not ranked), or start a virtual run with the same timer.