I find the guy [user:not-successful-yet,2026-01-07] is a AI cheater.↵
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##Evidence 1↵
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[submission: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.↵
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##Evidence 2↵
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This guys 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.↵
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##Evidence 3↵
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His submissions were very strange; He couldn't even solve a D problem in goodbye 2025.↵
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Please ban the cheater!
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##Evidence 1↵
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[submission: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.↵
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##Evidence 2↵
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This guy
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##Evidence 3↵
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His submissions were very strange; He couldn't even solve a D problem in goodbye 2025.↵
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Please ban the cheater!
