Done OI Start at: 2025-11-12 14:30 3 hour(s) Host:

kcs007 1

记得freopen 在题目上面

Status: Done
Rule: OI
Problem: 4
Start at: 2025-11-12 14:30
End at: 2025-11-12 17:30
Duration: 3 hour(s)
Host: kcs007
Partic.: 1