120510 has clearly been using AI to cheat in various contests. His submissions are clearly from ChatGPT:

• https://mirror.codeforces.com/contest/2120/submission/325453878

• https://mirror.codeforces.com/contest/2129/submission/331847344

Yesterday, he submitted and got WA 4 times on problem B, and then he deleted his entire template to copy ChatGPT's code:

• https://mirror.codeforces.com/contest/2129/submission/331780275

We need to get rid of dirty AI cheaters like this to keep codeforces clean.