I am very glad to invite you to the Codeforces Round #861 (Div. 2), which will take place in Mar/29/2023 12:05 (Moscow time). This round will be rated for the participants with rating lower than 2100.
My sincere thanks to:
Wind_Eagle, BaluconisTima, kartel, gepardo and 244mhq for the tasks ideas, and also BaluconisTima, 244mhq, VEGAnn, Vladik and andrew for preparing the tasks.
vilcheuski and programmer228 the rest of the author team, without whom this round would not have happened.
BaluconisTima for the splendacious pictures, which complement each problem.
MikeMirzayanov for Codeforces and Polygon platforms.
You for participating in this round.
You will have 2 hours and 30 minutes for solving 6 tasks, one of which will be divided into easy and hard verions. The round is based on the problems from the Belarusian National Olympiad. We kindly ask all Belarusian students who participated in this olympiad, to refrain from taking part in this round and discussing the problems publicly before the round ends.
I hope you will enjoy the round!
Round testers (will be available later): ...
Preliminary score distribution: 750-1000-1500-2000-2500-3250.