Reactor Cooling 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 reactor to produce plutonium for the nuclear bomb they are planni…

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…

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…

题目大概说一个核反应堆的冷却系统有n个结点,有m条单向的管子连接它们,管子内流量有上下界的要求,问能否使液体在整个系统中循环流动. 本质上就是求一个无源汇流量有上下界的容量网络的可行流,因为无源汇的容量网络上各个顶点都满足流量平衡条件,即所有点的∑流入流量=∑流出流量,可以看成里面的流是循环流动的,类似有向图欧拉回路. 而带上下界的网络可行流的求法,是根据网络流中一个流是可行流的充分必要条件——限制条件和平衡条件,去改造原网络,转化成不带下界的容量网络来求解的.数学模型那些证明之类的不难理解,见…

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…

Reactor Cooling 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…

Reactor Cooling 无源汇上下界最大流问题. 1.流量平衡. 2.满足上下界 模板题. #include <iostream> #include <queue> #include <vector> #include <cstdio> #include <cstring> using namespace std; const int MAXN = 200000 + 10; const int INF = 1 << 30; s…

称号:acdream 1211 Reactor Cooling 分类:无汇的有上下界网络流. 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. 而且满足每根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).同一时候最小不能低于Li. 比如: 个pipe) ,下界为1) 23 1 3 3 4 1 3 4 1 1 3 1 3 1 3…

 Description 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 re…

ZOJ 1314 Reactor Cooling | 上下界无源汇可行流 题意 有一个网络,每条边有流量的上界和下界,求一种方案,让里面的流可以循环往复地流动起来. 题解 上下界无源汇可行流的模型: 设置虚拟源点和虚拟汇点. 如果一条边\(u \to v\)的下界是\(mi\).上界是\(ma\),则在图中建一条\(u \to v\)的边,流量是\(ma - mi\),同时记录\(oud[u] += mi, ind[v] += mi\),分别代表\(u\)实际比图上多流出的流量与\(v\)实际比…