I find the guy not-successful-yet is a AI cheater.
Evidence 1
356808855 This submission contains a strange, unused function vertree, this function checks whether the input tree is connected. In fact, it was a trap specifically designed by the test creator for LLM. This is only checked in AI-submitted answers.
Evidence 2
This guy submited completely different solutions for problem I.I don't think humans could come up with so many different approaches in such a short time.
Evidence 3
His submissions were very strange; He couldn't even solve a D problem in goodbye 2025.
Please ban the cheater!
Auto comment: topic has been updated by Ana1999 (previous revision, new revision, compare).
Evidence 1 is already enough simply because tree by definition is connected graph with no cycles.
Damn, an AI cheater actually beat tourist.
we might actually be cooked bro
Auto comment: topic has been updated by Ana1999 (previous revision, new revision, compare).
Yep definitely cheating
As coordinator of the round I skipped this user for now. Hopefully the admins ban him because he is close to getting to GM through cheating.
I'm still a bit new to codeforces, why don't you just skip everyone before releasing ratings? It seems like there have been 18 people skipped and even though that's negligible for me, maybe it would make changes in rating gain for people in top 1k? I can't tell if this issue is out of your control or not.
I made sure to report him to the cheater database and he got marked! (＾▽＾)
XD, great talent