Hello, Codeforces!
Now the winter SIS (Summer Informatics School) is taking place, and parallel A+A0 and its teachers have prepared a complete Codeforces Round. You can check previous rounds, prepared by SIS students: Codeforces Round #612, Codeforces Round #530.
Codeforces Round #694 begins 05.01.2021 at 14:35 UTC. In both redactions, there will be $$$6$$$ problems for $$$2$$$ hours. The round is rated for both divisions.
Problems are authored by AliceG, pakhomovee, MadProgrammer, ArtNext, fastmath, IgorI, Kapt, KhB, Hello_zoka and prepared under the guidance of meshanya, cdkrot, kokokostya, craborac, scanhex.
We would like to thank:
300iq for round coordination.
MikeMirzayanov for Polygon and Codeforces.
Testers for testing the round and giving useful feedback.
We recommend you to read the statements of all problems. Scoring will be announced later.
Good luck!