Problem
A A*B Problem
B [Beginner-09]考场安检
C 自动修正
D 我们还能待多久？

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2025/07/21 新生课前测

Status: Done
Rule: ACM/ICPC
Problem: 4
Start at: 2025-7-21 8:00
End at: 2025-7-21 8:45
Duration: 0.8 hour(s)
Host: Hongshi
Partic.: 17