there is his code : http://mirror.codeforces.com/contest/610/submission/15050289
As we can see:

He got accepted.
But his code got wa2.

Maybe this is a Christmas present?
lol
I find a bug.
there is his code : http://mirror.codeforces.com/contest/610/submission/15050289
As we can see:

He got accepted.
But his code got wa2.

Maybe this is a Christmas present?
lol