[USACO4.2]草地排水Drainage Ditches 题目传送门 题目背景 在农夫约翰的农场上，每逢下雨，贝茜最喜欢的三叶草地就积聚了一潭水。这意味着草地被水淹没了，并且小草要继续生长还要花相当长一段时间。因此，农夫约翰修建了一套排水系统来使贝茜的草地免除被大水淹没的烦恼（不用担心，雨水会流
USACO Drainage Ditches 洛谷传送门 JDOJ传送门 Description 在农夫约翰的农场上,每逢下雨,贝茜最喜欢的三叶草地就积聚了一潭水.这意味着草地被水淹没了,并且小草要继续生长还要花相当长一段时间.因此,农夫约翰修建了一套排水系统来使贝茜的草地免除被大水淹没的烦恼（不用担心,雨
Drainage Ditches（最大流入门） EK+邻接矩阵： 1 #include <bits/stdc++.h> 2 using namespace std; 3 typedef long long ll; 4 #define rep(i,first,last) for(int i=first;i<=last;i++) 5 #define dep(i,first,last) for(int i=first;i>=last;i--) 6 const in
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 25940 Accepted Submission(s): 12214 Problem Description Every time it rains on Farmer John's fields, a pond forms over Bessie's favorite c
原文链接：http://www.cnblogs.com/ACAC/archive/2010/05/17/1737816.html #include<stdio.h>#include<string.h>#define MAX 201int m,n; //结点数int maxflow; //最大流int mat[MAX][MAX],pre[MAX],p[MAX];int queue[MAX*MAX];int min(int a,in
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 ditches so th
Luogu 2740 Code： #include <bits/stdc++.h> using namespace std; #define maxn 210 #define maxm 210 const int inf=1<<30; int n,m,s,t,head[maxm],size=1,vis[maxm]; struct egde { int v,w,nxt; }e[maxn<<1]; struct node { int vi,eg; }pre[maxn&
