Welcome to Codeforces Round #850 (Div. 1, based on VK Cup 2022 - Final Round) and Codeforces Round #850 (Div. 2, based on VK Cup 2022 - Final Round) that will start on Feb/05/2023 15:05 (Moscow time). Both rounds will be rated.
All the problems of Div. 1 round are authored and prepared by me, while KAN authored and prepared two problems for Div. 2. Thanks to errorgorn, irkstepanov, qwerty787788, Merkurev, IgorI, PavelKunyavskiy, izban, Alexdat2000, I_Remember_Olya_ashmelev, Akulyat, mike_live, Ekler, Kalashnikov for making this round better.
You will be given 6 problems and 3 hours to solve them.