Annyeonghaseyo, Codeforces!

We invite you to participate in Squarepoint Challenge (Codeforces Round 1055, Div. 1 + Div. 2), which will be held on Oct/03/2025 17:35 (Moscow time).

The round will be rated for everyone. You will be given 8 problems, one of which is divided into two subtasks, and 3 hours to solve them. One of the problems will be interactive, so make sure to read the guide for interactive problems before the contest.

The problems are authored and prepared by middle_man, djm03178, ko_osaga, and qwerasdfzxcl.

We would like to thank:

• errorgorn for great coordination.
• Alexdat2000 for great Russian translation.
• Adam_GS, ainta, bangan, BuzzyBeez, cookiedoth, Dragos, gamegame, garam1732, Geothermal, gs20036, harshith_04, my_bloody_valentine, Shirakami_Fubuki, madlogic, badtreap, maomao90, mathjuny, MEDAAA, mujigae, nikolashami, Pacybwoah, PeruvianCartel, platter, rqi, Sana, sqwiijqk, Sugar_fan, tfg, ttamx, Waldi, we12223, wizardrabbit for great testing.
• MikeMirzayanov and KAN for the great platforms.
• You for participating!

As some of you may know, this contest originates from my promise to hold a Codeforces round if T1 wins a World Championship, which they did win afterwards in 2023 and 2024. This contest is dedicated to the T1 League of Legends team, and each problem will feature the members of their roster following the 2023 season. They are the sole reason for this project, so I want to extend my thanks to them and wish them the best of luck in their 2025 run! For those who are unfamiliar with the game, don't worry, as the problem statements are written neutrally anyway.

Score distribution is $$$500 + 1500 + 1500 + 2500 + 3000 + 4000 + 4000 + (4000 + 2500)$$$.

Now, a few words from our sponsor!

We are proud to support this competition and the talented participants who represent the future of our industry.

Squarepoint Capital is a global investment management firm with headquarters in New York City and London, and offices around the world. The firm is known for its quantitative finance approach to investing.

Squarepoint is actively hiring! If you have a background in engineering, computer science, mathematics, statistics, econometrics, financial engineering, operations research, or physics, and you’re proficient in at least one major programming or scripting language — this could be your opportunity.

🎁 Prizes:

• Top 5 performers will receive a $300 Amazon voucher each.
• Next 10 highest scorers will receive a $50 Amazon voucher each.

Good luck, and happy coding!