题目链接 题意,判断次小生成树与最小生成树的权值和是否相等. 豆丁文档-- A-star和第k短路和次小生成树和Yen和MPS寻路算法 法一: 先求一次最小生成树,将这棵树上的边加入一个向量中,再判断去掉前面所求的最小生成树的某条边能否再求得一棵等权值的最小生成树 复杂度O(NElogE) //稠密图不可用 #include<bits/stdc++.h> using namespace std; + ; + ; int fa[maxn]; int n, m; vector<int>…
pid=4081">http://acm.hdu.edu.cn/showproblem.php?pid=4081 Problem Description During the Warring States Period of ancient China(476 BC to 221 BC), there were seven kingdoms in China ---- they were Qi, Chu, Yan, Han, Zhao, Wei and Qin. Ying Zheng wa…
Qin Shi Huang's National Road System Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) [Problem Description] During the Warring States Period of ancient China(476 BC to 221 BC), there were seven kingdoms in China ---…