HDOJ 1102 生成树

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Constructing Roads Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 11894 Accepted Submission(s): 4496 Problem Description There are N villages, which are numbered from 1 to N, and you should…

hdoj 1102 Constructing Roads

题目:http://acm.hdu.edu.cn/showproblem.php?pid=1102 分析:看到这题给出的都是矩阵形式,就知道了可以用Prim算法求MST. #include <iostream> using namespace std; #define typec int #define V 101 const typec inf=0x3f3f3f3f; int vis[V]; typec lowc[V],cost[V][V]; /*======================…

(MST) HDOJ 1102 Constructing Roads

怎么说呢这题就是个模板题但是 hud你妹夫啊说好的只有一组数据呢??? 嗯??? wa到家都不认识了好吗 #include <cstdio> #include <cstring> #include <queue> #include <vector> #include <algorithm> #define INF 0x3f3f3f3f using namespace std; typedef pair<int, int> pii;…

Hdoj 1102.Constructing Roads 题解

Problem Description 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 there is a road between A and B…

杭电hdoj题目分类

HDOJ 题目分类 //分类不是绝对的 //"*" 表示好题,需要多次回味 //"?"表示结论是正确的,但还停留在模块阶段,需要理解,证明. //简单题看到就可以敲的 1000: 入门用: 1001: 用高斯求和公式要防溢出 1004:1012: 1013: 对9取余好了 1017:1021: 1027: 用STL中的next_permutation() 1029:1032:1037:1039:1040:1056:1064:1065: 10…

【HDOJ】4305 Lightning

1. 题目描述当一个结点lightning后,可以向其周围距离小于等于R的结点传播lightning.然后以该结点为中心继续传播.以此类推,问最终形成的树形结构有多少个. 2. 基本思路生成树级数模板题目.Matrix-Tree定理(Kirchhoff矩阵-树定理):1) G的度数矩阵D[G]是一个n*n的矩阵,并且满足:当i≠j时,dij=0:当i=j时,dij等于vi的度数:2) G的邻接矩阵A[G]也是一个n*n的矩阵, 并且满足:如果vi.vj之间有边直接相连,则aij=1,否则为0.定…