Advent of Code means: solving programming puzzles in December. Please sign up soon, and maybe try out last years puzzles!

Join the CDE/MMT Leaderboard.

The number of stars for beginner level will be announced in December.

From the FAQ:

Should I use AI to solve Advent of Code puzzles? No. If you send a friend to the gym on your behalf, would you expect to get stronger? Advent of Code puzzles are designed to be interesting for humans to solve - no consideration is made for whether AI can or cannot solve a puzzle. If you want practice prompting an AI, there are almost certainly better exercises elsewhere designed with that in mind.