Time Limit: 2000MS   Memory Limit: 32768K Total Submissions: 20754   Accepted: 10872 Description A power network consists of nodes (power stations, consumers and dispatchers) connected by power transport lines. A node u may be supplied with an amount…

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…

增广路的核心就是引入了反向边,使在进行道路探索选择的时候增加了类似于退路的东西[有一点dp的味道??] 具体操作就是:1.首先使用结构体以及数组链表next[ MAXN ]进行边信息的存储 2.[核心]在存储正向边时,将正向边结构体数组相邻编号的元素存储反向边 [具体操作:如正向边为AA[0],则对应的反向边为AA[1],这样就可以在之后通过异或来对正向边对应的反向边进行更新][初始时反向边的容量为0] 3.通过dfs进行寻路,寻路过程要用数组记录下来路经过的边的编号,便于在找到终点后遍历找边的…

题目:http://acm.hdu.edu.cn/showproblem.php?pid=3549 Flow Problem Time Limit: 5000/5000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others) Total Submission(s): 5111    Accepted Submission(s): 2385 Problem Description Network flow is a well-kn…

题目:http://acm.hdu.edu.cn/showproblem.php?pid=3549 模板题,白书上的代码... #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <queue> using namespace std; <<; ][],flow[][],n; int Edmonds_Karp(in…

#include <iostream> #include <queue> #include<string.h> using namespace std; #define arraysize 201 int maxData = 0x7fffffff; ][]; ]; ]; int n,m; queue<int> q; int BFS(int s,int t) { int i,j; while(!q.empty()) q.pop(); ;i<m+;i++)…

#include<cstdio> #include<cstring> #include<string> #include<cmath> #include<vector> #include<queue> #include<algorithm> using namespace std; + ; const int INF = 0x7FFFFFFF; struct Edge { int from, to, cap, flow;…

参考: https://blog.csdn.net/txl199106/article/details/64441994 分析: 该算法是用bfs求出是否有路从s到t, 然后建立反向边(关于反向边), 最终求出答案, 复杂度(mn) #include<bits/stdc++.h> using namespace std; + ; + ; << ); struct Edge { int v, nxt, w; }; struct Node { int v, id; }; int n,…

#include<iostream> #include<cstring> #include<algorithm> #include<cmath> #include<cstdio> #include<queue> using namespace std; struct data { int from,to,next,cup; data(){,to=-,next=-,cup=-;} }e[]; ,head[]; ]; ]; void ad…

Drainage Ditches Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 70588   Accepted: 27436 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…