In contest 1138(div.2).There is a bad thing happened.Coder .tourist. login my id and copy my solution for problem D(He get my password.But because he changed the code a bit.The system didn't find he is cheating and let him become candidate master.My solution:51012795 And his solution:51014298. I think this is not a good behavior and MikeMirzayanov you should ban this ID. Please pay attention to this serious thing.