梦想还是要有的

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 A and B are connected, if and only if t

次小生成树是在最小生成树基础上得到的，得到最小生成树后，将其中一条不在最小生成树上的边连到最小生成树上去则在最小生成树上会构成一个环，去掉环上最长的边，则得到一棵次小生成树，将其它所有不在最小生成树上的边遍历一遍，按照这种方法操作一遍，保留的最小值就是次小生成树的值#include #include #include #include #include #define N