Today is coming regular Codeforces round #163 for Div.2 participants. Traditionally the others can take part out of the competition.
The problems were prepared by authors: Rakhov Artem (RAD), Kudryashov Igor (KudryashovIA), Pavel Kholkin (HolkinPV) and Gerald Agapov (Gerald). Traditionally thanks to Michael Mirzayanov (MikeMirzayanov) for Codeforces system and Mary Belova (Delinur) for translating the problems.
UPD: It is decided to use dynamic scoring system. The problems will be sorted from low difficulty to high by authors' opinion.
We wish everyone good luck and high rating)
UPD2: the contest is over, hope you enjoy it)
Congratulations to winners:
UPD3: the editorial can be found here)