矩阵旋转难题

Done IOI Start at: 2025-8-18 14:00 0.5 hour(s) Host: 25

考察

Status
Done
Rule
IOI
Problem
3
Start at
2025-8-18 14:00
End at
2025-8-18 14:30
Duration
0.5 hour(s)
Host
Partic.
25