题意:http://www.phpfans.net/article/htmls/201012/MzI1MDQw.html 1.在一个会议室里有n种插座,每种插座一个: 2.每个插座只能插一种以及一个电器(或者适配器): 3.有m个电器,每个电器有一个插头需要插在相应一种插座上: 4.不是所有电器都能在会议室找到相应插座: 5.有k种适配器,每种适配器可以有无限多数量: 6.每种适配器(a, b)可以把b类插座变为a类插座: 7.问最后有多少个电器无法使用. 分析:图片来源:http://www.…

POJ 1087 A Plug for UNIX / HDU 1526 A Plug for UNIX / ZOJ 1157 A Plug for UNIX / UVA 753 A Plug for UNIX / UVAlive 5418 A Plug for UNIX / SCU 1671 A Plug for UNIX (网络流) Description You are in charge of setting up the press room for the inaugural meet…

A Plug for UNIX   Description You are in charge of setting up the press room for the inaugural meeting of the United Nations Internet eXecutive (UNIX), which has an international mandate to make the free flow of information and ideas on the Internet…

A Plug for UNIX 题目链接:https://vjudge.net/problem/POJ-1087 Description: You are in charge of setting up the press room for the inaugural meeting of the United Nations Internet eXecutive (UNIX), which has an international mandate to make the free flow o…

题目链接:https://vjudge.net/problem/POJ-1087 A Plug for UNIX Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 17861   Accepted: 6172 Description You are in charge of setting up the press room for the inaugural meeting of the United Nations In…

A Plug for UNIX Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 14862   Accepted: 5026 Description You are in charge of setting up the press room for the inaugural meeting of the United Nations Internet eXecutive (UNIX), which has an int…

题面 You are in charge of setting up the press room for the inaugural meeting of the United Nations Internet eXecutive (UNIX), which has an international mandate to make the free flow of information and ideas on the Internet as cumbersome and bureaucra…

题目连接:http://poj.org/problem? id=1087 题意: n种插座 ,m个电器,f组(x,y)表示插座x能够替换插座y,问你最多能给几个电器充电. 解法:起点向插座建边,容量1,电器向汇点建边.容量1,插座向电器建边.容量1,能够替换的插座间建边.容量无穷大.然后套板子. ..求最大流. 代码: #include <stdio.h> #include <ctime> #include <math.h> #include <limits.h&…

网络流,关键在建图 建图思路在代码里 /* 最大流SAP 邻接表 思路:基本源于FF方法,给每个顶点设定层次标号,和允许弧. 优化: 1.当前弧优化(重要). 1.每找到以条增广路回退到断点(常数优化). 2.层次出现断层,无法得到新流(重要). 时间复杂度(m*n^2) */ #include <iostream> #include <cstdio> #include <cstring> #include <map> #define ms(a,b) mem…

描述 You are in charge of setting up the press room for the inaugural meeting of the United Nations Internet eXecutive (UNIX), which has an international mandate to make the free flow of information and ideas on the Internet as cumbersome and bureaucra…