链接: http://poj.org/problem?id=1087 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=82835#problem/C http://acm.hust.edu.cn/vjudge/contest/view.action?cid=88230#problem/J(密码:0817) n个插座,m个电器及其对应的插座,k个转化器,前一个插座可以转化为后一个插座,问最少有多少设备没有插座用,转换器数量不限最大流,源点…

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 bureaucratic…

题意: 几种插头,每一种都只有一个,但有无限个插头转换器,转换器(a,b) 意味着 可以把b转换为a,有几个设备,每个设备对应一种插头,求所不能匹配插头的设备数量 这个题可以用二分图做 , 我用的是最大流,最后用设备数 减去 最大匹配数即可 #include <iostream> #include <cstring> #include <cstdio> #include <algorithm> #include <cmath> #include…

题目大意:这个题意有些蛋疼,看了很大会才明白什么意思,有N个插座,这些插座都是有类型的只能给这种类型的电器充电,下面接着给了M种电器,和电器的插头类型,还有K种转换器,可以把一种类型转换成另一种,转换器也是可以串联使用的. 输入说明: 首先输入的是一个N,下面有N种插座,每种插座都有一个字符串代表,接着输入一个M,表示有M个电器需要充电,输入的每行有一个电器和它需要的插座类型,然后输入一个K,下面有K个转换器. 分析:这个英文写的这么长确实比较难理解,不过看懂题意后也是比较容易了,可以让电器给可…

链接: http://poj.org/problem?id=1273 Drainage Ditches Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 63763   Accepted: 24613 Description Every time it rains on Farmer John's fields, a pond forms over Bessie's favorite clover patch. This m…

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…

C - A Plug for UNIXTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=88038#problem/C Description You are in charge of setting up the press room for the inaugural meeting of the United Nations Internet…

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…

http://poj.org/problem?id=1459 嗯,网络流模板...多源点多汇点的图,超级汇点连发电厂,用户连接超级汇点 Status Accepted Time 391ms Memory 1588kB Length 2166 Lang G++ Submitted 2018-05-23 14:43:22 Shared RemoteRunId 18625420 #include <iostream> #include <string.h> #include <cm…

C - A Plug for UNIX    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 cumb…

A Plug for UNIX Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 14786 Accepted: 4994 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 interna…

                                   A Plug for UNIX Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 16083   Accepted: 5513 Description You are in charge of setting up the press room for the inaugural meeting of the United Nations Internet…

  A Plug for UNIX  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 cumberso…

解题报告 题意: n个插头m个设备k种转换器.求有多少设备无法插入. 思路: 定义源点和汇点,源点和设备相连,容量为1. 汇点和插头相连,容量也为1. 插头和设备相连,容量也为1. 可转换插头相连,容量也为inf(由于插头有无限个) #include <map> #include <queue> #include <cstdio> #include <vector> #include <cstring> #include <iostream…

Drainage Ditches Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 63339   Accepted: 24434 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…

A Plug for UNIX Time Limit: 1000ms Memory Limit: 65536KB This problem will be judged on PKU. Original ID: 108764-bit integer IO format: %lld      Java class name: Main     You are in charge of setting up the press room for the inaugural meeting of th…

A Plug for UNIX 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…

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 Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 13855   Accepted: 4635 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…

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 as…

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: 15597   Accepted: 5308 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…

题目链接:https://vjudge.net/problem/POJ-1087 题目:有n个插座,插座上只有一个插孔,有m个用电器,每个用电器都有插头,它们的插头可以一样, 有k个插孔转化器, a b 的意思就是  可以把 b类的插孔变成a类的插孔,那么a类对于的插头就可以用这个插孔充电了. 问:没插孔的用电器最少有几个. 思路:源点->插座->用电器->汇点. 因为插座之间可以相互转化,可能A,B,C,D都可以变成E类的插座,所以插座之间的流应该为INF,其他的边流都是1,起到限流的…

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…

题目描述:现在由你负责布置Internet联合组织首席执行官就职新闻发布会的会议室.由于会议室修建时被设计成容纳全世界各地的新闻记者,因此会议室提供了多种电源插座用以满足(会议室修建时期)各国不同插头的类型和电压.不幸的是,会议室是很多年前修建的,那时新闻记者很少使用电子设备,所以会议室对每种插座只提供了一个.新闻发布会时,新闻记者需要使用许多电子设备,如手提电脑,麦克风,录音机,传呼机等等.尽管这些设备很多可以使用电池,但是由于发布会时间很长并且是单调乏味的,记者们希望能够使用尽可能多的设备(…

在大米饼的帮助下,终于找到了大米饼程序中如同大米饼一般的错误! 考点在问题转化,然后就跑一个你喜欢的最大流算法(二分图可以啵?) 再来一个例子吧: [纯手绘大米饼图片] 其中有的边权是1,否则就是inf,所以就将问题转化为求超级源点(0)到超级汇点(13)的最大流.我依旧使用ISAP,很开心用ISAP做完了所有老师要求用迪尼克或者艾德蒙·卡普算法做的几个题目,开心点在哪里呢-在乎大米饼之中也.最后一个困扰了me20min的错误是: 把device[i][1]错写成device[i][2],使得C…

http://poj.org/problem?id=1087 好久没遇见过这么坑的题了这个题真是挫的够可以的.题目大意:你作为某高管去住宿了,然后宾馆里有几种插座,分别有其对应型号,你携带了几种用电器(手机,电脑一类的), 也有其对应型号:可是不一定用电器就能和插座匹配上,于是宾馆的商店里提供了一些转换器,这些转换器可以将某一型号电源转换成另一型号的.问,你的用电器最少会有多少种无 法充电.也就是问可以用上电的用电器的最大数目,之后用电器总数减去此可用电最大数目即可得到最小不能用电数目. 一开始…