hdu 1532 题目大意: 就是由于下大雨的时候约翰的农场就会被雨水给淹没,无奈下约翰不得不修建水沟,而且是网络水沟,并且聪明的约翰还控制了水的流速,本题就是让你求出最大流速,无疑要运用到求最大流了.题中N为水沟数,M为水沟的顶点,接下来Si,Ei,Ci分别是水沟的起点,终点以及其容量.求源点1到终点M的最大流速.注意重边 Dinic算法的实现有以下几个步骤: 1:初始化容量网络和网络流 2:构造残留网络和层次网络,若汇点不在层次网络中则算法结束 输出最大流 3:在层次网络中用一次DFS进行增…

Drainage Ditches Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 76000   Accepted: 29530 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…

Drainage Ditches Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 91585   Accepted: 35493 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…

Drainage Ditches Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 78671   Accepted: 30687 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…

J. Drainage Ditches Time Limit: 1000ms Memory Limit: 32768KB 64-bit integer IO format: %I64d      Java class name: Main   Every time it rains on Farmer John's fields, a pond forms over Bessie's favorite clover patch. This means that the clover is cov…

dinic版本 感觉dinic算法好帅,比Edmonds-Karp算法不知高到哪里去了 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. Th…

http://poj.org/problem?id=1273 用Dinic求最大流的模板题,注意会有重边. 邻接矩阵建图 #include<stdio.h> #include<string.h> #include<queue> #include<algorithm> using namespace std; ; const int INF = 0x3f3f3f3f; int flow[maxn][maxn];//残量 int m,n; int dis[max…

虽然算法还没有理解透,但以及迫不及待地想要A道题了. 非常裸的最大流,试试lrj的模板练练手. #include <cstdio> #include <cstring> #include <algorithm> #include <vector> #include <queue> using namespace std; + ; ; struct Edge { int from, to, cap, flow; Edge(int u, int v,…

#include <cstdio> #include <cstring> #include <algorithm> #include <queue> using namespace std; typedef long long ll; #define space putchar(' ') #define enter putchar('\n') #define INF 0x7fffffff template <class T> void read(…

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 John has built a set of drainage…