/*次小生成树 题意:给你一些路径,现在将一部分路径权值减少后问是否可以替代最小生成树里面的边. 解:次小生成树,即将这条边连上,构成一个环 求出任意两点路径之间的除了这条边的最大值,比较这个最大值>=这条边,说明可以替换. prime算法次小生成树模板 */ #include<stdio.h> #include<string.h> #define N 1100 #define inf 0x3fffffff int ma[N][N]; int Min(int a,int b)…

次小生成树模板,别忘了判定不存在最小生成树的情况 #include <iostream> #include <cstdio> #include <cstring> using namespace std; + ; const int inf = 0x3f3f3f3f; int MAX[maxn][maxn], mp[maxn][maxn], dis[maxn], pre[maxn]; int t, n, m; bool vis[maxn], used[maxn][max…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K       Description Given a connected undirected graph, tell if its minimum spanning tree is unique.  Definition 1 (Spanning Tree): Consider a connected, undirected graph G = (V, E). A spanning t…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 23942   Accepted: 8492 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undire…

Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undirected graph G = (V, E). A spanning tree of G is a subgraph of G, say T = (V', E'), with the following properties…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 20737   Accepted: 7281 Description Given a connected undirected graph, tell if its minimum spanning tree is unique.  Definition 1 (Spanning Tree): Consider a connected, undir…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 22668   Accepted: 8038 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undire…

prim #include <iostream> #include <cstdio> #include <cstdlib> #include <cmath> #include <algorithm> #include <cstring> #include <stack> #include <cctype> #include <queue> #include <string> #inclu…

裸题,上模板就行,注意j  !  =  k #include<map> #include<set> #include<cmath> #include<queue> #include<stack> #include<vector> #include<cstdio> #include<cassert> #include<iomanip> #include<cstdlib> #include&…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions:34617   Accepted: 12637 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undire…