That is the 133th Codeforces round. Specially for the 2nd division. Contestants from the 1st division can solve the round out of competition.
The round will use dymanic scoring system.
Problems will be ordered in random manner (see UPD1). If you want get more happiness from solving that round, please, read statements of all problems.
UPD1. Jury members discussed and have decided to rearrange problems in expected order of difficulty.
Editorial will be
soon tommorow (I am very tired =_=, but now you can try to read russian editorial here).
UPD3. Editorial in English.