Problem
A 限速（speed）
B 酒鬼（drunkard）
C 单峰数列（peak）
D 团队选拔（selection）

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1121

Status: Done
Rule: OI
Problem: 4
Start at: 2025-11-21 14:00
End at: 2025-11-21 16:00
Duration: 2 hour(s)
Host: kcs007
Partic.: 40