Comments

You are right.During the writing of the code I was very confused about O(nlog2n) could AC. After submission I reacted that it would be better to use vector .But when I got Ac,I didn't pay attention to it again,I fst while some of my friend got ac with set,that would be a shame for me.

But my submission with std::map receive TLE,with std::set receive AC

Not only did he use GPT to complete the competition, but he even posted a video, did he want to show off? Even exposing his name in his videos, as a cheater, he's stupid enough

On iNNNoCodeforces Round 951 (Div. 2), 23 months ago
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Yes, D's system testing is simply not too watery

On iNNNoCodeforces Round 951 (Div. 2), 23 months ago
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I've noticed that some people's code in the D issue uses string addition, which I think will cause a timeout, but their code is ac, is the test point not rigorous enough, or is the string concatenation not o(n)?