Comments
+10

I think, the only problem is that the fake accounts hacks the normal accounts. Why we just don't deny hacking for the new users?

0

Ok I understand.
0

http://codeforces.me/contest/518/hacks/137892/test I think I was hacked against rules. In C statement is written: "Each integer from 1 to n occurs exactly once among a_i." How it is possible and what to do?