Problem
A 巧克力
B 好数列
C 染色
D 子集和中位数

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暑假集训模拟赛2

Status: Done
Rule: OI
Problem: 4
Start at: 2025-8-17 14:15
End at: 2025-8-17 18:15
Duration: 4 hour(s)
Host: admin
Partic.: 10