RedStoneShark and lzjin cheats: 277415393 and 277416632 are basically the same code in Codeforces Round 967 (Div. 2)[https://codeforces.me/contest/2001/standings].

RedStoneShark and William_ChenZiMo cheats: 276246724 and 276274586 are basically the same code in Codeforces Round 966 (Div. 3)[https://codeforces.me/contest/2000/standings].

RedStoneShark and William_ChenZiMo cheats: 297521888 and 297519919 are basically the same code in Codeforces Round 994 (Div. 3)[https://codeforces.me/contest/2049/standings].

This should be punished.

I hope the administrator will deal with it as soon as possible.