In several days (July 24, 19:30 MSK) will take place Codeforces Round #193 (Div. 2), which I have prepared. Those who has already reached the first division traditionally can participate in the round out of the competition.
I would like to thank Vitaliy Gridnev (gridnevvvit), Pavel Kunyavskiy (PavelKunyavskiy) and Dmitriy Ivanov (DmitriyIvanov) for testing of problemset, coordinator of Codeforces rounds Gerald Agapov (Gerald) for useful hints and Maria Belova (delinur) for translation of statements into English.
Good luck and high rating to all!
UPD1. The score distribution in this round will be dynamic (see here). In our opinion problems are sorted according to their difficulty.
UPD2. Analysis of problems is publisched.
UPD3. Rating is updated. Congrutalations to the winners who solved 4 problems: