Problem
A 难or易？
B 好or坏？
C 读or过？
D 缺or满？

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2025年新学期热身赛

Status: Done
Rule: IOI
Problem: 4
Start at: 2025-2-6 0:00
End at: 2025-2-13 0:00
Duration: 2 hour(s)
Host: Csvoner
Partic.: 24