Problem
A [PKUSC2018] 真实排名
B [USACO20JAN] Cave Paintings P
C [国家集训队] 等差子序列
D [PKUSC2018] 最大前缀和

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赛前训练

Status: Done
Rule: OI
Problem: 4
Start at: 2025-10-28 16:15
End at: 2025-10-28 20:15
Duration: 4 hour(s)
Host: lqc
Partic.: 3