Problem
A 优美
B 异或
C 石头
D 密码

According to the contest rules, you cannot view your submission details at current.

Oh, there is no clarification!

0813BC班测试

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