During the Codeforces round you can hack solutions of other participants. You can not only enter small test manually but also submit program (test generator) that writes to stdout your test (this is useful if your test is large). Of course this test must satisfy all the requirements from problem statement.

You know, having more than one account is against Codeforces rules.

It's obvious that all of these are the same person :

mobinTEY, Mobin_Teymoori, mobinTE, mobin_temyoori, Mobint3ymoori, mr.mobin, mobin2000 .