Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1705    Accepted Submission(s): 653 Problem Description In graph theory, a pseudoforest is an undirected graph in which every conne…

#include <cstdio> #include <cstring> #include <vector> #include <algorithm> using namespace std; ; int n, m; struct node { int u, v, c; }g[maxn]; long long ans; int fa[maxn]; int ff[maxn]; int ee[maxn]; bool cmp(node a, node b){ re…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3367 Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2870    Accepted Submission(s): 1126 Problem Description In graph theory, a pseu…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1070    Accepted Submission(s): 417 Problem Description In graph theory, a pseudoforest is an undirected graph in which every conne…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2351    Accepted Submission(s): 910 Problem Description In graph theory, a pseudoforest is an undirected graph in which every connec…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 2382    Accepted Submission(s): 933 Problem Description In graph theory, a pseudoforest is an undirected graph in which every conne…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1526    Accepted Submission(s): 580 Problem Description In graph theory, a pseudoforest is an undirected graph in which every connec…

题意:有一种叫作Pseudoforest的结构,表示在无向图上,每一个块中选取至多包含一个环的边的集合,又称“伪森林”.问这个集合中的所有边权之和最大是多少? 分析:如果没有环,那么构造的就是最大生成森林,在此基础上,只要取每个块中剩余边的最大边,必然得到结果.不过要构造出每条边归属于哪个块.  看了别人的代码,发现原来可以直接构造出一个标记数组记录环,在做并查集的时候扩充if(find(u)==find(v))这一条件,可以直接得到结果. #include<cstdio> #include&…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 1844    Accepted Submission(s): 704 Problem Description In graph theory, a pseudoforest is an undirected graph in which every connec…

传送门: http://acm.hdu.edu.cn/showproblem.php?pid=3367 Pseudoforest Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 3242    Accepted Submission(s): 1273 Problem Description In graph theory, a pseu…

http://acm.hdu.edu.cn/showproblem.php? pid=4786 Fibonacci Tree Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1733    Accepted Submission(s): 543 Problem Description Coach Pang is interested i…

链接:http://acm.hdu.edu.cn/showproblem.php?pid=4786 题意:有N个节点(1 <= N <= 10^5),M条边(0 <= M <= 10^5).当中一部分边被染成了黑色,剩下的边是白色,问能不能建立一棵树,树中有斐波那契数个白色边. 思路:用克鲁斯卡尔建三次树,第一是用全部边建树.推断能否建成一棵树,第二次用黑边建树,最多能够用到x条黑边(不成环),n-1-x就是最少须要用的白边的数量,第三次用白边建树,最多能够用到y条白边.假设在[y…

并查集. #include <cstdio> #include <cstring> #include <cstdlib> #define MAXN 10005 #define INF 0xffffff typedef struct { int c, s, e; } edge_st; edge_st edges[]; int pre[MAXN]; int deg[MAXN]; int n, m, ans; int comp(const void *a, const voi…

Matrix Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1394    Accepted Submission(s): 758 Problem Description Yifenfei very like play a number game in the n*n Matrix. A positive integer number…

转自——http://blog.csdn.net/qwe20060514/article/details/8112550 =============================以下是最小生成树+并查集======================================[HDU]1213   How Many Tables   基础并查集★1272   小希的迷宫   基础并查集★1325&&poj1308  Is It A Tree?   基础并查集★1856   More i…

=============================以下是最小生成树+并查集====================================== [HDU] 1213 How Many Tables 基础并查集★ 1272 小希的迷宫 基础并查集★ 1325&&poj1308 Is It A Tree? 基础并查集★ 1856 More is better 基础并查集★ 1102 Constructing Roads 基础最小生成树★ 1232 畅通工程 基础并查集★ 123…

=============================以下是最小生成树+并查集====================================== [HDU] 1213 How Many Tables 基础并查集★ 1272 小希的迷宫 基础并查集★ 1325&&poj1308 Is It A Tree? 基础并查集★ 1856 More is better 基础并查集★ 1102 Constructing Roads 基础最小生成树★ 1232 畅通工程 基础并查集★ 123…

HDU 1000 A + B Problem  I/O HDU 1001 Sum Problem  数学 HDU 1002 A + B Problem II  高精度加法 HDU 1003 Maxsum  贪心 HDU 1004 Let the Balloon Rise  字典树,map HDU 1005 Number Sequence  求数列循环节 HDU 1007 Quoit Design  最近点对 HDU 1008 Elevator  模拟 HDU 1010 Tempter of th…

转自:http://blog.csdn.net/shahdza/article/details/7779230 [HDU]1213 How Many Tables 基础并查集★1272 小希的迷宫 基础并查集★1325&&poj1308 Is It A Tree? 基础并查集★1856 More is better 基础并查集★1102 Constructing Roads 基础最小生成树★1232 畅通工程 基础并查集★2120 Ice_cream's world I 基础并查集★212…

并查集题型简单并查集1213 How Many Tables 1232 畅通工程 (杭电简单的并查集不是很多) 简单最小生成树1233 还是畅通工程 1863 畅通工程 1874 畅通工程再续 1875 继续畅通工程 1162 Eddy's picture 1102 Constructing Roads 1301 Jungle Roads(可以通过最小生成树练习并查集) 稍微有点难度并查集1272 小希的迷宫 1325 Is It A Tree? 1856 More is better 有点难度…

=============================以下是最小生成树+并查集====================================== [HDU] How Many Tables 基础并查集★ 小希的迷宫 基础并查集★ &&poj1308 Is It A Tree? 基础并查集★ More is better 基础并查集★ Constructing Roads 基础最小生成树★ 畅通工程 基础并查集★ 还是畅通工程 基础最小生成树★ 畅通工程 基础最小生成树★ 畅通…

题目链接:http://icpc.njust.edu.cn/Problem/Hdu/3367/ 题目要求一个连通图的最大伪森林,伪森林是一个最多有一个回路的图.我们只要用Kruskal最大生成树的策略就可以,给根节点表上记号表明这棵树有没有负环.其实也有一些贪心的思想. 代码如下: #include<bits/stdc++.h> using namespace std; typedef unsigned int ui; typedef long long ll; typedef unsigne…

CUGBACM_Summer_Tranning4 比赛链接:http://vjudge.net/contest/view.action?cid=52230#overview 题解链接: F . HDU 4786 Fibonacci Tree 生成树 链接:http://blog.csdn.net/ooooooooe/article/details/38379855 J . HDU 4790 Just Random 数学 链接:http://blog.csdn.net/ooooooooe/arti…

一.知识目录 字符串处理 ................................................................. 3 1.KMP 算法 ............................................................ 3 2.扩展 KMP ............................................................ 6 3.Manacher 最长回文子串 .......…

Pseudoforest Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 389 Accepted Submission(s): 165   Problem Description In graph theory, a pseudoforest is an undirected graph in which every connected…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5627 题意:Bestcoder的一道题,让你求&意义下的最大生成树. 解法: 贪心,我们从高位到低位贪心,如果含有这一位的边能够构成一棵树的话,我们就可以直接把其他不含有这一位的边全部去掉 然后重复这个行为 这个贪心显然正确啦,至于判断能否构成一颗树,就用并查集就好啦 //HDU 5627 #include <bits/stdc++.h> using namespace std; cons…

HDU - 4305 题意: 比较裸的一道生成树计数问题,构造Krichhoof矩阵,求解行列式即可.但是这道题还有一个限制,就是给定的坐标中,两点连线中不能有其他的点,否则这两点就不能连接.枚举点,用叉积计算是否共线即可. #include <algorithm> #include <iterator> #include <iostream> #include <cstring> #include <cstdlib> #include <…

HDU 6187 Destroy Walls (思维,最大生成树) Destroy Walls *Time Limit: 8000/4000 MS (Java/Others) Memory Limit: 132768/132768 K (Java/Others) Total Submission(s): 1784 Accepted Submission(s): 692 * Problem Description Long times ago, there are beautiful histor…

Problem Description There are N robots standing on the ground (Don't know why. Don't know how). Suddenly the sky turns into gray, and lightning storm comes! Unfortunately, one of the robots is stuck by the lightning!So it becomes overladen. Once a ro…

Description In graph theory, a pseudoforest is an undirected graph in which every connected component has at most one cycle. The maximal pseudoforests of G are the pseudoforest subgraphs of G that are not contained within any larger pseudoforest of G…