Done IOI Start at: 2025-8-13 8:30 3.5 hour(s) Host:

kcs007 47

不需要freopen，题目难度与顺序无关，IOI赛制

Status: Done
Rule: IOI
Problem: 4
Start at: 2025-8-13 8:30
End at: 2025-8-13 12:00
Duration: 3.5 hour(s)
Host: kcs007
Partic.: 47