题目链接:http://poj.org/problem?id=1459 题意:有n个结点,np个发电站,nc个消费者,m个电力运输线.接下去是m条边的信息(u,v)cost,cost表示边(u,v)的最大流量:a个发电站的信息(u)cost,cost表示发电站u能提供的最大流量:b个用户的信息(v)cost,cost表示每个用户v能接受的最大流量. 思路:在图中添加1个源点S和汇点T,将S和每个发电站相连,边的权值是发电站能提供的最大流量:将每个用户和T相连,边的权值是每个用户能接受的最大流量.…

                                     Power Network Time Limit: 2000MS   Memory Limit: 32768K Total Submissions: 27229   Accepted: 14151 Description A power network consists of nodes (power stations, consumers and dispatchers) connected by power trans…

https://vjudge.net/problem/POJ-1459 题解转载自:優YoU http://user.qzone.qq.com/289065406/blog/1299339754 解题思路 多源多汇最大流问题 题目给出很多都是废话,特别是符号s(u),d(u),Con还有那条公式都别管,混淆视听 难点在于构图 电站p(u)均为源点,用户c(u)均为汇点,中转站当普通点处理 第一个误区是例图, 结点 和 边 都有x/y(流量和容量),这个很容易使人产生矛盾(因为学习最大流问题是,只…

题目链接:https://vjudge.net/problem/POJ-1459 Power Network Time Limit: 2000MS   Memory Limit: 32768K Total Submissions: 29270   Accepted: 15191 Description A power network consists of nodes (power stations, consumers and dispatchers) connected by power t…

Power Network Time Limit: 2000MS   Memory Limit: 32768K Total Submissions: 24019   Accepted: 12540 Description A power network consists of nodes (power stations, consumers and dispatchers) connected by power transport lines. A node u may be supplied…

Power Network Time Limit: 2000MS   Memory Limit: 32768K Total Submissions: 31086   Accepted: 15986 题目链接:http://poj.org/problem?id=1459 Description: A power network consists of nodes (power stations, consumers and dispatchers) connected by power trans…

Power Network Time Limit: 2000MS   Memory Limit: 32768K Total Submissions: 25832   Accepted: 13481 Description A power network consists of nodes (power stations, consumers and dispatchers) connected by power transport lines. A node u may be supplied…

Description A power network consists of nodes (power stations, consumers and dispatchers) connected by power transport lines. A node u may be supplied with an amount s(u) >= 0 of power, may produce an amount 0 <= p(u) <= p max(u) of power, may co…

Time Limit: 2000MS   Memory Limit: 32768K Total Submissions: 20754   Accepted: 10872 Description A power network consists of nodes (power stations, consumers and dispatchers) connected by power transport lines. A node u may be supplied with an amount…

原题链接 题意简述 原题看了好几遍才看懂- 给出一个个点,条边的有向图.个点中有个源点,个汇点,每个源点和汇点都有流出上限和流入上限.求最大流. 题解 建一个真 · 源点和一个真 · 汇点.真 · 源点向所有原源点连容量等于其上限的边,所有原汇点向真 · 汇点连容量等于其上限的边.跑一遍最大流即可. Code //Power Network #include <cstdio> #include <cstring> #include <algorithm> using n…