It’s time for the second round of the VK Cup 2012. Let me remind you that the registration for this round is also required and it’s closed five minutes before the start.
The problemset has been developed by various authors from VK, Codeforces and Saratov State University. We worked hard to make this time interesting for competitors and to have the best ones in the next round.
This round will be run according to Codeforces rules: with room assignments, hacks and usual score decrease. It will be rated for you either if you participate in VK Cup or just solve it as a normal round.
Top 175 competitors will advance to the second round immediately. 25 more competitors will advance to the second round via the second unusual rules wildcard round on March 28. This round will consist of only one problem with inexact solution.
Please, to make the round even more interesting for you, read the statements of ALL problems.
Good luck and try to win!