Сoronavirus work, coronavirus school, coronavirus rest, coronavirus time spending, coronavirus contest.
Problems of this round were prepared by Alexey Alexdat2000 Datskovskiy, Ilian ilian04 Andrianov, Vsevolod Sevlll Lepeshov. We have made an effort to create interesting problems, beautiful statements and strong tests. We wish you like problems and your rating increase.
We would like to express our gratitude to:
MikeMirzayanov for wonderful platforms Codeforces and Polygon!
300iq for excellent coordination and helpful advices!
UPD 1: Scoring distribution: 500 — 750 — 1500 — 1500 — 2000 — 2500