Problem
A 阶乘计算
B 合法网格
C 异或划分
D 指针游戏

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

Oh, there is no clarification!

10.24

Status: Done
Rule: OI
Problem: 4
Start at: 2023-10-24 10:10
End at: 2023-10-24 13:40
Duration: 3.5 hour(s)
Host: Hydro
Partic.: 1