Solving the contest from gym I found the problem I even don't know how to approach. The problem is here: http://codeforces.com/gym/100451/problem/G
Can't get the idea for tricky problem from Petrozavodsk 2014
Solving the contest from gym I found the problem I even don't know how to approach. The problem is here: http://codeforces.com/gym/100451/problem/G