题目描述 The terrorist group leaded by a well known international terrorist Ben Bladen is buliding a nuclear reactor to produce plutonium for the nuclear bomb they are planning to create. Being the wicked computer genius of this group, you are responsibl…

The terrorist group leaded by a well known international terrorist Ben Bladen is buliding a nuclear reactor to produce plutonium for the nuclear bomb they are planning to create. Being the wicked computer genius of this group, you are responsible for…

题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=2314 The terrorist group leaded by a well known international terrorist Ben Bladen is buliding a nuclear reactor to produce plutonium for the nuclear bomb they are planning to create.…

Reactor Coolinghttp://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1314 Time Limit: 5 Seconds      Memory Limit: 32768 KB      Special Judge The terrorist group leaded by a well known international terrorist Ben Bladen is buliding a nuclear re…

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=1314 题意:    给n个点,及m根pipe,每根pipe用来流躺液体的,单向的,每时每刻每根pipe流进来的物质要等于流出去的物质,要使得m条pipe组成一个循环体,里面流躺物质. 并且满足每根pipe一定的流量限制,范围为[Li,Ri].即要满足每时刻流进来的不能超过Ri(最大流问题),同时最小不能低于Li. 模板:无源汇有上下界可行流 #include<stdio.h>…

题意:看是否有无源汇上下界可行流,如果有输出流量 题解:对于每一条边u->v,上界high,下界low,来说,我们可以建立每条边流量为high-low,那么这样得到的流量可能会不守恒(流入量!=流出量),这时我们要想使得流量守恒,我们需要建立附加流,附加流 是在刚才的图上的改进流,对于每一个点如果有流入量(in)>流出量(out),那么对于多余的流入量,我们需要想办法新加一条边流量为in-out流入该点,反之如果in<out,那么需要建立一条边流量为out-in流出该点,我们此时可以建立…

ZOJ_2314_Reactor Cooling_有上下界可行流模板 The terrorist group leaded by a well known international terrorist Ben Bladen is buliding a nuclear reactor to produce plutonium for the nuclear bomb they are planning to create. Being the wicked computer genius of…

题目链接:https://nanti.jisuanke.com/t/31447 "Oh, There is a bipartite graph.""Make it Fantastic." X wants to check whether a bipartite graph is a fantastic graph. He has two fantastic numbers, and he wants to let all the degrees to between…

[题目链接] http://poj.org/problem?id=2396 [题意] 知道一个矩阵的行列和,且知道一些格子的限制条件,问一个可行的方案. [思路] 设行为X点,列为Y点,构图:连边(s,Xi,sumXi,sumXi)(Yi,t,sumYi,sumYi)(Xi,Yj,down[i][j],up[i][j]). 则问题就是求一个有源汇点st的上下界可行流. 类似于 无源无汇上下界可行流 ,添加附加源汇点ST,边权转化为up-down,由ST向每个点连边保持流量平衡.然后添加(t,s,…

POJ2396 Budget 题意:n*m的非负整数矩阵,给出每行每列的和,以及一些约束关系x,y,>=<,val,表示格子(x,y)的值与val的关系,0代表整行/列都有这个关系,求判断是否有解并求一组解 建图显然 \[s \rightarrow _{[行和,行和]} x \rightarrow _{格子(x,y)的限制[l,r]} y \rightarrow_{[列和,列和]} t\] 有源汇上下界可行流 注意是非负整数 #include <iostream> #include…