In Codeforces Round 958 (Div. 2) round ,in official standing you can clearly see that I have completed Problem B in just 12 minutes and the warning message/mail sent by system contains such participants who has mostly lower than my rating and they have submitted code after my submission .And I am 100% sure that this is someone from the same room who have leaked my code .I think that Codeforces should add some features such that participants in same room can not leak the code of other after submitting it .

This is my room in which I was assigned during contest.

I hope that Codeforces team and MikeMirzayanov will look into this and try to resolve the problem of leakage of codes in same room by either removing hacking feature or something else by which other participant in the room can't copy the code...