Welcome all to Codeforces Beta Round #17, which will be held . This contest will represent I.
I would like to thank Mike Mirzayanov who made this contest possible, Artem Rakhov for helping to test authors solutions and Julia Satushina for nice the translation of problem statements into English. Great thank Gennady Korotkevich for preparation problem, writing authors solution and nice idea's. Hope you will like the problems.
I hope that number 17 would be interesting for you!
You can discuss the problems here in the comments after the end of the contest.