HDU 5723 Abandoned country(kruskal+dp树上任意两点距离和)
摘要：
Problem DescriptionAn abandoned country has n(n≤100000) villages which are numbered from 1 to n. Since abandoned for a long time, the roads need to be 阅读全文
posted @ 2018-10-18 10:27 大桃桃 阅读(152) 评论(0) 推荐(0)
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