Could anyone explain to me why this solution for this problem is true problem http://codeforces.me/contest/313/problem/E Solution http://codeforces.me/contest/313/submission/9096673
Could anyone explain to me why this solution for this problem is true problem http://codeforces.me/contest/313/problem/E Solution http://codeforces.me/contest/313/submission/9096673