Problem
A 日期输出
B 圆的相关计算
C 三个数排序
D N数之和（三）
E 判断质数

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随堂小测

Status: Done
Rule: IOI
Problem: 5
Start at: 2026-1-1 8:45
End at: 2026-1-31 8:45
Duration: 1.5 hour(s)
Host: admin
Partic.: 30