Hello Codeforces,

We are very glad to invite you to participate in Codeforces Round 1057 (Div. 2), which will start on Oct/10/2025 17:35 (Moscow time). You will be given 6 problems and 2 hours to solve them.

All the problems are written and prepared by me and maomao90.

We would like to give our sincere thanks to:

• maomao90 for his wonderful coordination and careful adjustments to some problems!
• Alexdat2000 for translating problem statements.
• __baozii__, _istil, rui_er, AC-Automation, permutation, A_G, Andreasyan for red testing.
• -firefly-, K-423, frey4, Friedrich, Proof_by_QED for orange testing.
• xudian, Sofija06, qsmcgogo for purple testing.
• wink for blue testing.
• absi2011 for green testing.
• chou_maple for grey testing.
• MikeMirzayanov for the great codeforces and polygon platform.
• You for participating in the round.

The score distribution is $$$500 - 750 - 1250 - 1750 - 2250 - 3250$$$.

Hope everyone will enjoy the round!