赛前模拟4

Done OI Start at: 2024-10-25 13:00 1.5 hour(s) Host: 12

请注意文件读写

The contest is a flexible time contest. You need to complete the contest within a specified time after you attended.

Status
Done
Rule
OI
Problem
2
Start at
2024-10-25 13:00
End at
2024-10-25 23:00
Duration
1.5 hour(s)
Host
Partic.
12