Problem
A 未实现的愿景（vision）
B 风与牧歌的城邦（mondstadt）
C Serenity（Serenity）
D 恨火，流向原野（flame）

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NOIp4 模拟赛

Status: Done
Rule: IOI
Problem: 4
Start at: 2024-11-28 19:00
End at: 2024-11-28 21:00
Duration: 2 hour(s)
Host: Csvoner
Partic.: 9