Problem
A 全排列
B 全排列2
C a+b
D a*b问题
E 三角形面积

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北辰杯模拟赛（伪）

Status: Done
Rule: ACM/ICPC
Problem: 5
Start at: 2025-2-16 14:30
End at: 2025-2-20 14:30
Duration: 96 hour(s)
Host: 石清泉
Partic.: 3