Hello, Codeforces!
We are glad to invite everyone to participate in Codeforces Round 773 (Div. 1) and Codeforces Round 773 (Div. 2), which will be held on Feb/23/2022 13:10 (Moscow time). Notice the unusual time! The round will be rated for both divisions. Each division will have 6 problems, and you will have 2 hours to solve them. We recommend you read all the problems!
Tasks are based on RocketOlymp, and were written and prepared by __silaedr__, daubi, alegsandyr, ilyakrasnovv, and isaf27.
We are very thankful to
isaf27 for the great coordination, valuable advice, and patience.
Renatyss, stepanov.aa, talant, Siberian, kirill.kligunov, arbuzick for the help during discussing and preparing problems.
Our testers: AlperenT, ArtNext, EvgeniyPonasenkov, FedShat, Qwerty1232, TeaTime, TheEvilBird, ak2006, generic_placeholder_name, philmol, silvvasil, tox1c_kid for their feedback
pakhomovee for the task, that didn't find its place in the final problemset.
KAN for helping with round preparation
MikeMirzayanov for codeforces and polygon platform
Olympiad's participants cannot participate in codeforces rounds simultaneously.
Good luck and have fun!
UPD — Scoring distribution:
div2: $$$500 - 750 - 1250 - 2000 - 2000 - 2500$$$
div1: $$$500 - 1250 - 1250 - 1750 - 2250 - 3000$$$
UPD — Editorial