CUCaTS Codevent

Horizontal poster for Codevent Calendar 2026

Codevent is CUCaTS's December puzzle competition. Problems are released daily, and correct answers earn stars. Scores reward solving earlier, producing a month-long leaderboard.

Getting started

Read the problem, solve it in your preferred language and submit the answer. You do not submit source code.

  • Read the whole problem before starting.
  • Try a straightforward solution first.
  • Save the input so you can rerun your code.
  • Use the leaderboard if you enjoy competing, or work at your own pace.

Check the competition site for release times, scoring and current rules. Announcements and discussion are on the CUCaTS Discord.

If you enjoy the puzzles, try Advent of Code or see Competitive Programming.