#include <stdio.h> #include <string.h> #include <stdlib.h> #include <queue> #include <math.h> #define inf 0x3f3f3f3f using namespace std; ][],v[],pre[]; int n,m; int bfs(int s,int t) { memset(v,,sizeof(v)); memset(pre,-,sizeo…

解题关键:使用的挑战程序设计竞赛上的模板,第一道网络流题目,效率比较低,且用不习惯的vector来建图. 看到网上其他人说此题有重边,需要注意下,此问题只在邻接矩阵建图时会出问题,邻接表不会存在的,也体现了邻接表的优越性? edge结构体的第三个变量为from的下标. 模板一: #include<bits/stdc++.h> #define MAX_V 17 #define inf 0x3f3f3f3f using namespace std; typedef long long ll; in…

Flow Problem Problem Description Network flow is a well-known difficult problem for ACMers. Given a graph, your task is to find out the maximum flow for the weighted directed graph.   Input The first line of input contains an integer T, denoting the…

Flow Problem Time Limit: 5000/5000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 17963    Accepted Submission(s): 8464 Problem Description Network flow is a well-known difficult problem for ACMers. Given a graph, y…

Flow Problem Time Limit: 5000/5000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others) Total Submission(s): 8387    Accepted Submission(s): 3908 Problem Description Network flow is a well-known difficult problem for ACMers. Given a graph, y…

http://poj.org/problem?id=1273 Description Every time it rains on Farmer John's fields, a pond forms over Bessie's favorite clover patch. This means that the clover is covered by water for awhile and takes quite a long time to regrow. Thus, Farmer Jo…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=3549 题目大意: 给有向图,求1-n的最大流 解题思路: 直接套模板,注意有重边 传送门:网络流入门 #include<iostream> #include<vector> #include<cstring> #include<cstdio> #include<queue> using namespace std; const int INF =…

裸最大流,做模板用 m条边,n个点,求最大流 #include <iostream> #include <cstdio> #include <cstring> #include <queue> #include <algorithm> using namespace std; ; const int INF = 0x7fffffff; int flow[N]; int cap[N][N]; int pre[N]; queue<int>…

题目链接. 分析: 网络流增广路算法模板题.http://www.cnblogs.com/tanhehe/p/3234248.html AC代码: #include <iostream> #include <queue> #include <cstdio> #include <cstring> using namespace std; ; <<); int cap[maxn][maxn], flow[maxn][maxn]; int n; int…

题目链接 题意 裸的最大流. 学习参考 http://www.cnblogs.com/SYCstudio/p/7260613.html Code #include <bits/stdc++.h> #define inf 0x3f3f3f3f #define maxm 1010 #define maxn 20 using namespace std; typedef long long LL; struct Edge { int to, ne, c; }edge[maxm<<1];…