Problem
A [NOIP 2015 普及组] 金币
B 奇怪的算法
C 缺少的数字
D 排列

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系统小测试

Status: Done
Rule: IOI
Problem: 4
Start at: 2025-9-10 19:30
End at: 2025-9-10 21:30
Duration: 2 hour(s)
Host: root
Partic.: 1