Hey Codeforces!

We've been creating the Cloudflight Coding Contest (CCC) with all love to code for years. Next edition is coming up on November 14th 2025!

You are welcome to participate online , or on-site if you are around at one of our 40+ locations across Europe!

If you are a beginner — pick the #school track, and if you wanna challenge yourself — pick the #classic. And if you are into training your own AI — pick the #data/ai track!

You can also team up with friends — up to 3/5 members depending on track. You can also find teammates in our Discord Community.

Prizes --> Each location has prizes and you are competing with the local community for it (not with all the 5k participants). The bigger the location — the more items we prepare.

To prepare for the competition and have fun, try our games on the platform.

If you've never participated so far, you can get the vibe of the event from the aftermovie..

Looking forward to a day of awesome coding!