hdu1102 Constructing Roads prim最小生成树There are N villages, which are numbered from 1 to N, and you should build some roads such that every two villages can connect to each other. We say two village ...
洛谷P1547 Out of Hay 最小生成树题目背景奶牛爱干草题目描述Bessie 计划调查N (2 <= N <= 2,000)个农场的干草情况,它从1号农场出发。农场之间总共有M (1 <= M <= 10,000)条双向道路,所有道路的总长度不超过1,000,000,000。有些农场之间存在着多条道路,所有的农场之间都是连通的。Bessie希望计算出该图中最...