Problem
A 序列异或（xor）
B 自驾游 (trip)
C 无敌闯关

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1117

Status: Done
Rule: OI
Problem: 3
Start at: 2025-11-17 8:30
End at: 2025-11-17 11:30
Duration: 3 hour(s)
Host: kcs007
Partic.: 9