Codeforces Round #816 (Div. 2)

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Hello, Codeforces!

We are glad to invite everyone to participate in Codeforces Round #816 (Div. 2), which will be held on Saturday, August 20, 2022 at 14:35UTC. The round will be rated only for the second division. You will have 6 tasks and 2 hours to solve them. We recommend you read all the problems.

Round is completely set by winter SIS (Summer Informatics School) students. During the camp we did our best to prepare interesting and creative problems. You can check previous rounds prepared by SIS students: Codeforces Round #815 (Div. 2), Codeforces Round #694, Codeforces Round #612, Codeforces Round #530

We are very thankful to

• task authors and developers: Vasilyev Allvik06 Alexey, Denis Kapt Mustafin, Ivan __silaedr__ Podvorniy, Ilya ilyakrasnovv Krasnov, Evgenii pakhomovee Pakhomov, Mikhail MadProgrammer Zaytsev.

• to the wonderful teachers who made this round happen: Pavel PavelKunyavskiy Kunyavskiy, Dmitriy cdkrot Sayutin, Alesya AlesyaIvanova Ivanova, Konstantin kokokostya Makhnev

• Monogon for the great coordination, valuable advice, and patience

• KAN for the help during preparation of the contest

• Qwerty1232 for the help with the editorial

• testers for good proposals and important feedback: zer0brain, kclee2172, AndreyPavlov, generic_placeholder_name, nor, TheScrasse, qualdoom, AlperenT, FairyWinx, vdv09, NToneE, KseniaShk, prost_sasha, agrayush13, kartikeyasri23, SomethingNew

• MikeMirzayanov and geranazavr555 for codeforces and polygon platform

Scoring distribution will be released before the contest begins

We hope that You will participate in our round, as well as in SIS!

Good luck and have fun!