Out of curiosity I was wondering, which are the problems you all have seen with the largest time limit? I've found this one from ICPC WFs 2020, which has a Time Limit of 30s (https://mirror.codeforces.com/gym/104633) [the one called QC QC]
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Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)
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Spectral::Cup 2026 Round 1 (Codeforces Round 1094, Div. 1 + Div. 2)
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