RedStoneShark and lzjin cheats: 277415393 and 277416632 are basically the same code in Codeforces Round 967 (Div. 2)[https://codeforces.net/contest/2001/standings].
RedStoneShark and William_ChenZiMo cheats: 276246724 and 276274586 are basically the same code in Codeforces Round 966 (Div. 3)[https://codeforces.net/contest/2000/standings].
RedStoneShark and William_ChenZiMo cheats: 297521888 and 297519919 are basically the same code in Codeforces Round 994 (Div. 3)[https://codeforces.net/contest/2049/standings].
This should be punished.
I hope the administrator will deal with it as soon as possible.
Auto comment: topic has been updated by himshu2 (previous revision, new revision, compare).
@System @MikeMirzayanov
you literally went pupil by solving only 13 problems,looks like you are the cheater here
This might be his alt
Look at his/her headshot, he/she is from China, maybe trained in other Chinese platforms such as luogu.com.cn, only use codeforces.com for taking part in some competitions.