Today I just recived system email from codeforces that my solution is similar to some users for 1494A from last Educational round ,, in contest my compiler crushed and now I have to use any online editor, I used Ideone to test my code the default in IDEONE your code will be public to other users, this is the cheaters submission and that's not there first time. I wish the admins deal with them and again, check the privacy of your code if you will use ideone .
Sorry for bad English ((: 
One question: Who use IDEone?)
everyone asks who use ideone, no one asks why use ideone