Hello, Codeforces!

max0000561, a.nasretdinov and I are glad to invite you to our Codeforces Round 907 (Div. 2), which will be held on Oct/30/2023 17:35 (Moscow time). The round will be rated for all the participants with rating strictly less than 2100.

On behalf of our team, I want to thank:

• Coordinator 74TrAkToR for invaluable help in preparing the round.
• Testers maomao90, LeoPro, SomethingNew, maks_matiupatenko, max0000561, yaroslav_n, glebustim, Vash_nick, Murinh0, Topperoo, Alarick, priyanshu.p, Greg908, buffering, ventilator13, medved, zwezdinv, Rodionno for high-quality testing of the round and useful feedbacks!
• medved for excellent translations of the problems into English.
• MikeMirzayanov for amazing Codeforces and Polygon platforms.

And special thanks to my friends who have made a huge contribution to this round: Amir a.nasretdinov Nasretdinov, Maksim max0000561 Krylykov and Tanya medved Medved. Also thank you for all four years of friendship:)

During the round you will need to solve 6 problems. You will have 2 hours to solve them.

Score distribution: $$$500-750-1000-1500-2000-2250$$$

Good luck and, please, read the statements of all problems!

UPD: Editorial is out.

Congratulations to the winners:

Unofficial: \begin{enumerate} \item neal \item arvindf232 \item kotatsugame \item maspy \item Geothermal \end{enumerate}

Official: \begin{enumerate} \item ETO \item MikeMirzayakahashi \item stklight \item win1919810 \item Little_Leaf \end{enumerate}