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…

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…

题目链接 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 tree of G is a subgraph of G, say T = (V', E'), with the fol…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 28207   Accepted: 10073 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…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 27141   Accepted: 9712 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undire…

The Unique MST                                                                        Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 24058   Accepted: 8546 Description Given a connected undirected graph, tell if its minimum spanning tre…

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 tree of G is a subgraph of G, say T = (V', E'), with the followi…

http://poj.org/problem?id=1679 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 tree of G is a subgraph of G, say…

最小生成树的唯一性,部分参考了oi-wiki 如果一条不在最小生成树边集内的边,它可以替换一条在最小生成树边集内,且权值相等的边,那么最小生成树不是唯一的 同过kruskal来判断 考虑权值相等的边,记录有几条边是目前可以被选入的,和实际选入了几条边,如果不相同,则最小生成树不唯一 原因是如果出现这两个值不相等的情况,则一定出现了环,且这个环内至少有两条边权值相同 具体实现,用一个\(\text{tail}\)指针指向当前权值的最后一条边,当\(\text{i}>\text{tail}\)(也就…

The Unique MST 题目链接: http://acm.hust.edu.cn/vjudge/contest/124434#problem/J 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).…

http://poj.org/problem?id=1679 The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 17726   Accepted: 6150 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 38430   Accepted: 14045 题目链接:http://poj.org/problem?id=1679 Description: Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanni…

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…

题目链接:http://poj.org/problem?id=1679 The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 29408   Accepted: 10520 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spannin…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 22715   Accepted: 8055 Description Given a connected undirected graph, tell if its minimum spanning tree is unique.  Definition 1 (Spanning Tree): Consider a connected, undir…

题目连接 http://poj.org/problem?id=1679 The Unique MST 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 tree of G is a…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 24034   Accepted: 8535 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undire…

The Unique MST 时间限制: 10 Sec  内存限制: 128 MB提交: 25  解决: 10[提交][状态][讨论版] 题目描述 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 tre…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 29902   Accepted: 10697 Description Given a connected undirected graph, tell if its minimum spanning tree is unique.  Definition 1 (Spanning Tree): Consider a connected, undi…

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: 39561   Accepted: 14444 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 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 tree of G…

PTA 7-4 最小生成树的唯一性 (35分) 给定一个带权无向图,如果是连通图,则至少存在一棵最小生成树,有时最小生成树并不唯一.本题就要求你计算最小生成树的总权重,并且判断其是否唯一. 输入格式: 首先第一行给出两个整数:无向图中顶点数 N(≤500)和边数 M.随后 M 行,每行给出一条边的两个端点和权重,格式为"顶点1 顶点2 权重",其中顶点从 1 到N 编号,权重为正整数.题目保证最小生成树的总权重不会超过 2^30 输出格式: 如果存在最小生成树,首先在第一行输出其总权重…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 25203   Accepted: 8995 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undire…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 19941   Accepted: 6999 Description Given a connected undirected graph, tell if its minimum spanning tree is unique.  Definition 1 (Spanning Tree): Consider a connected, undir…

题目:poj 1679 The Unique MST 题意:给你一颗树,让你求最小生成树和次小生成树值是否相等. 分析:这个题目关键在于求解次小生成树. 方法是,依次枚举不在最小生成树上的边,然后加入到最小生成树上,然后把原树上加入了之后形成环的最长的边删去,知道一个最小的.就是次小生成树. 这些须要的都能够在求解最小生成树的时候处理出来. AC代码: #include <cstdio> #include <cstring> #include <iostream> #i…

首先,贴上一个很好的讲解贴: http://www.wutianqi.com/?p=3012 HDOJ 1233 还是畅通工程 http://acm.hdu.edu.cn/showproblem.php?pid=1233 裸的Prim... #include<cstdio> #define MAXN 105 #define INF 0x3f3f3f3f int map[MAXN][MAXN]; int dist[MAXN]; int vis[MAXN]; int n,a,b,x,ans,tot…

The Unique MST Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 20421   Accepted: 7183 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: 24152   Accepted: 8587 Description Given a connected undirected graph, tell if its minimum spanning tree is unique. Definition 1 (Spanning Tree): Consider a connected, undire…