Problem
A T1就给你上数学题(math)
B 银河护卫队
C 社交网络服务 (sns.cpp)
D 魔法传送门 (magic.cpp)

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0818

Status: Done
Rule: OI
Problem: 4
Start at: 2025-8-18 8:15
End at: 2025-8-18 11:45
Duration: 3.5 hour(s)
Host: kcs007
Partic.: 61