Problem
A BOSS 树
B 黄金树的召唤
C 二进制回文字符串
D 皮卡丘

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1028

Status: Done
Rule: OI
Problem: 4
Start at: 2025-10-28 18:00
End at: 2025-10-28 20:00
Duration: 2 hour(s)
Host: kcs007
Partic.: 16