in problem E of the last contest http://codeforces.net/contest/805/problem/E i was surprised to see that many people managed to pass the tests outputting wrong answers like these guys: http://codeforces.net/contest/805/submission/26866266 http://codeforces.net/contest/805/submission/26865714 http://codeforces.net/contest/805/submission/26865560 they output numbers outside the range (1,c) and the validator doesn't notice it somehow and they get accepted i just wanted to share this issue with you guys :)