I'd like to invite you to Codeforces Round #297 (Div. 2). It'll be held on Thursday, March 26 at 19:30 MSK and as usual Div. 1 participants can join out of competition.
Great thanks to Maxim Akhmedov (Zlobober) for helping me preparing the contest, to Maria Belova (Delinur) for translating the statements into English, to Mike Mirzayanov (MikeMirzayanov) for the great Polygon platform and ideas of some problems and to my old friends Pavel Kholkin (HolkinPV), Ilya Los (IlyaLos), Vitaliy Kudasov (kuviman) and Arthur Svechnikov (ikar) for writing solutions.
The scoring distribution will be announced later. Good luck everyone!
UPD The scoring is smooth dynamic (with steps of 250 points). More information about this can be found here. Tasks will be arranged in order of ascending supposed difficulty.
UPD2 Competition completed! Thank you all!
UPD3 You can find editorial here.
UPD4 Congratulations to the winners!