Problem
A [ROI 2024] 割草 (Day 2)
B [ROI 2024] 机器人物流 (Day 1)
C 「ROI 2025 Day1」天狼星的换班
D [ROI 2024] 2026 (Day 1)

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NOIP赛前信心赛

Status: Done
Rule: OI
Problem: 4
Start at: 2025-11-26 13:00
End at: 2025-11-26 17:00
Duration: 4 hour(s)
Host: lqc
Partic.: 11