Hello, Codeforces!

We are very excited to invite you to participate in Codeforces Round 11** (Div. 2) which will be held on Oct/26/2026 17:35 (Moscow time). You will be given 2 hours and 15 minutes to solve 7 problems.

Problems are authored by yvbf, JerrySyr and MoScenix.

We would like to give special thanks to:

• Um_nik for the preliminary review of this contest.
• cry for the brilliant and great coordination.
• AksLolCoding, __baozii__, -firefly- for red testing.
• GUAIKATTO, 7_divided_by_3 for yellow testing.
• Edeeva, More, WorldWarV, yinruiyang for purple testing.
• Misaka16172, nik_exists, Yzm007 for blue testing.
• MORNING for cyan testing.
• MikeMirzayanov, KAN for the great platforms.
• placeholder for detailed Russian translation.
• TianTianChaoFangDe, tc_adventureking, MaxBlazeIceInk for providing problem ideas ( but declined :-/ )

The scoring distribution will be added soon.

We are such a group of committed codeforces users. It's our first time to hold a formal round on codeforces, hope we have more chances in the future, and so we also hope you enjoy the problems!

Good luck and have fun!