Problem
A 序列异或（xor）
B 自驾游 (trip)
C 车马象 (chess)
D 距离 (distance)

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国庆欢乐赛2

Status: Done
Rule: OI
Problem: 4
Start at: 2024-10-4 14:00
End at: 2024-10-4 18:00
Duration: 4 hour(s)
Host: root
Partic.: 35