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UID: 17925, Registered at 2 months ago, last login at 2 months ago, last active at 19 hours ago.

Solved 4 problems, RP: 14 (No. 5549)

♂

This person is lazy and didn't write anything.

P2271

P2324

P2342

P2892

This person is lazy and didn't join any contests or homework.

模拟: 2
搜索: 1
枚举: 1
双指针: 1
DFS: 1