Done IOI Start at: 2025-7-12 14:00 3.5 hour(s) Host:

kcs007 37

难度J组

老规矩，200分送徽章，300分送一周大吉

Status: Done
Rule: IOI
Problem: 4
Start at: 2025-7-12 14:00
End at: 2025-7-12 17:30
Duration: 3.5 hour(s)
Host: kcs007
Partic.: 37