树的直径
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没有遗憾的人生是不完美的
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Roads in the North（树的直径）
Roads in the NorthTime Limit:1000MS Memory Limit:65536KB 64bit IO Format:%lld & %lluSubmit StatusDescriptionBuilding and maintaining roads among communities in the far Nort原创 2016-08-02 21:39:00 · 257 阅读 · 0 评论 -
Cow Marathon（树的直径）（最长路）
Cow MarathonTime Limit:2000MS Memory Limit:30000KB 64bit IO Format:%lld & %lluSubmit StatusDescriptionAfter hearing about the epidemic of obesity in the USA, Farmer John wa原创 2016-08-02 18:19:44 · 320 阅读 · 0 评论