Problem
A 特征抽取（character)
B 正方形划分（square）
C 树上观察（observe）
D 收衣服（sort）

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CSP-J复赛模拟5

Status: Done
Rule: IOI
Problem: 4
Start at: 2025-10-8 14:00
End at: 2025-10-29 10:00
Duration: 500 hour(s)
Host: zhouyou
Partic.: 8