UPD: REGISTRATION IS NOW OPEN

Hello Codeforces,

We invite you to the CodeSquare Round 1, which will take place on Mar/22/2026 17:35 (Moscow time). You will be given $$$6 - 7$$$ problems to solve, and $$$3$$$ hours to solve them. The format will be ICPC, identical to Educational, Div. 4 and Div. 3 rounds. This round is open to all participants.

We'd like to thank:

• AlexandruINV for creating the CodeSquare discord server

• t3jtex, Ruzgar and rex333 for authoring the problems.

• baodat, fatespeaker, Your_Fav_Varsh, Erik_Piza, Tom_a and Arachnyd for testing.

• MikeMirzayanov and KAN for the brilliant Codeforces and Polygon platform.

Note from AlexandruINV (Admin):

It’s genuinely great to see this idea come to life. What started as a simple thought, just a small group of people solving problems together, has already turned into something much more meaningful. Seeing people participate, improve, and engage with each other makes it all worth it.

The Codeforces contest we’re running reflects exactly what I hoped this community could become. I want to thank everyone who helped organize it and supported the idea from the beginning, this wouldn’t have been possible without you.

We’re looking forward to growing this further and making it better over time. Any feedback, suggestions, or ideas for improvement are always appreciated.

I hope you enjoy the problems, and I’m really glad to have this community together.

GLHF!