Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an apparentl…

OJ题号: BZOJ3996.洛谷2936.SPOJ-MTOTALF.SCU3353 思路: 题目的要求是将所有边合并成一条边,求合并后的流量. 实际上相当于直接求最大流. EdmondsKarp模板即可. #include<iostream> #include<vector> #include<queue> #include<cstring> #include<algorithm> ,E=,s=,t=,inf=0x7fffffff; inlin…

P2936 [USACO09JAN]全流Total Flow 题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different…

题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an appa…

题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an appa…

题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an appa…

题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an appa…

3396: [Usaco2009 Jan]Total flow 水流 Time Limit: 1 Sec  Memory Limit: 128 MBSubmit: 45  Solved: 27[Submit][Status] Description   Input 第1行输入N,之后N行每行描述一条水管,前两个英文字母表示水管的两端(大小写字母是不一样的),后一个整数表示水管的流量,流量不会超过1000. Output 一个整数,表示总流量． Sample Input 5 A B 3 B C 3…

3396: [Usaco2009 Jan]Total flow 水流 Time Limit: 1 Sec  Memory Limit: 128 MBSubmit: 179  Solved: 73[Submit][Status] Description   Input 第1行输入N,之后N行每行描述一条水管,前两个英文字母表示水管的两端(大小写字母是不一样的),后一个整数表示水管的流量,流量不会超过1000. Output 一个整数,表示总流量． Sample Input 5 A B 3 B C…

题 裸题不多说,在网络流的练习题里,你甚至可以使用暴力. #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int,int> pii; template<typename T>inline :;} template<typename T>inline :;} template<typename T>inline T _min(T A,T…

题目链接:https://www.luogu.org/problemnew/show/P2936 菜 #include <queue> #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> using namespace std; const int maxn = 10000; const int inf = 1e9; int n, m, s,…

#include<cstdio> #include<cstring> #include<algorithm> #include<queue> using namespace std; #define INF 2147483647 #define MAXN 201 #define MAXM 1501 int v[MAXM],cap[MAXM],en,first[MAXN],next[MAXM]; int d[MAXN],cur[MAXN]; queue<…

http://www.lydsy.com/JudgeOnline/problem.php?id=3396 裸的最大流跑过.. #include <cstdio> #include <cstring> #include <cmath> #include <string> #include <iostream> #include <algorithm> #include <queue> using namespace std;…

题意:给出一些边,给出边的容量.让你为所有边确定一个方向使得流量最大. 题目不用求最大流, 而是求每条边的流向,这题是考察网络流的基本规律. 若某图有最大,则有与源点相连的边必然都是流出的,与汇点相连的边必然是流入的,其它所有点流入和流出的流量是相等的. 我们可以根据这一规律来求解. 先求出所有点(除了源点和汇点)的总流量(表示流入的流量的2倍),每次流过该边,更新的时候减去流入流量的2倍. 从源点出发广搜每个点,搜的过程可以确定经过边的流向,当某个点的剩余总流量为0时,表示流入该点的流量边已经…

最大流生动形象的板子,注意数组开大点 #include<iostream> #include<cstdio> #include<queue> #include<cstring> using namespace std; const int N=100,inf=1e9; int n=26,m,h[N],cnt=1,s=1,t=26,le[N],x; char s1[5],s2[5]; struct qwe { int ne,to,va; }e[N*N*2];…

Farm Tour 题目描述 When FJ's friends visit him on the farm, he likes to show them around. His farm comprises N (1 <= N <= 1000) fields numbered 1..N, the first of which contains his house and the Nth of which contains the big barn. A total M (1 <= M…

Ref MIT: lecture-13-incremental-improvement-max-flow-min-cut/ Ford Fulkerson algorithm for finding maximal flow in a flow network: Keep adding flow through new augmenting paths for as long as it is possible; When there are no more augmenting paths, y…

网络流-最大流 这题……建模部分先略过 这道题是会卡时限的T_T俺的Dinic被卡了,在此放几篇很棒的讲网络流算法的文章,至于大家耳熟能详的论文就不放了…… http://www.cppblog.com/panzhizhou/articles/172978.html?opt=admin 里面的各种超链接也很不错的……       好的来重新更新一下……这题因为要二分,需要多次重建跑最大流,所以不能用像lrj大爷的白书上那样用vector存边(太慢),需用前向星= = 然后……本蒻由于第一次写前向…

-----------------------------最优化问题------------------------------------- ----------------------常规动态规划  SOJ1162 I-Keyboard  SOJ1685 Chopsticks SOJ1679 Gangsters SOJ2096 Maximum Submatrix  SOJ2111 littleken bg SOJ2142 Cow Exhibition  SOJ2505 The County…

Search GO 说明:输入题号直接进入相应题目,如需搜索含数字的题目,请在关键词前加单引号 Problem ID Title Source AC Submit Y 1000 A+B Problem 10983 18765 Y 1036 [ZJOI2008]树的统计Count 5293 13132 Y 1588 [HNOI2002]营业额统计 5056 13607 1001 [BeiJing2006]狼抓兔子 4526 18386 Y 2002 [Hnoi2010]Bounce 弹飞绵羊 43…

1 引子2 问题描述3 模型准备4网格5模型设置6 材料设置7 设定注入器8 修改材料9 Cell zone Conditions设置10 边界条件设置10.1 inlet入口设置10.2 出口设置10.3 壁面边界设置11 初始化及计算12 查看粒子追踪13 查看壁面冲蚀 1 引子 本案例的目的在于演示如何使用FLUENT软件模拟计算3D弯头中的冲蚀现象.冲蚀现象在工程应用中是一种非常普遍的现象. 本案例主要展示以下内容: 使用冲蚀模型分析3D弯头中的冲蚀现象 使用离散相模型 使用合适的求解参…

Java基础常见英语词汇(共70个) ['ɔbdʒekt] ['ɔ:rientid]导向的                             ['prəʊɡræmɪŋ]编程 OO: object-oriented ,面向对象 OOP: object-oriented programming,面向对象编程 [dɪ'veləpmənt][kɪt]工具箱                              ['vɜːtjʊəl]虚拟的 JDK:Java development kit, j…

Aabstract 抽象的abstract base class (ABC)抽象基类abstract class 抽象类abstraction 抽象.抽象物.抽象性access 存取.访问access function 访问函数access level访问级别account 账户action 动作activate 激活active 活动的actual parameter 实参adapter 适配器add-in 插件address 地址address space 地址空间ADO(ActiveX D…

The EMD is based on the minimal cost that must be paid to transform one distribution into the other.Intuitively,given two distributions,one can be seen as a mass of earth properly spread in space,the other as a collection of holes in that same space.…

后端使用django实现,返回的数据可以修改为从数据库获取或其他方式获取,实例里是写死的数据. urls配置: url(r'^outip/chart/$', views.charts), url(r'^outip/getchart/$', views.get_chart), url(r'^outip/getlast/$', views.get_last), url(r'^outip/detail/$', views.get_detail_chart), 所有实例浏览器访问的后端方法:charts…

算法常用术语中英对照Data Structures 基本数据结构Dictionaries 字典PriorityQueues 堆Graph Data Structures 图Set Data Structures 集合Kd-Trees 线段树Numerical Problems 数值问题Solving LinearEquations 线性方程组Bandwidth Reduction 带宽压缩Matrix Multiplication 矩阵乘法Determinants and Permanents…

java:  第一章: JDK(Java Development Kit) java开发工具包 JVM(Java Virtual Machine) java虚拟机 Javac  编译命令 java  解释命令 Javadoc  生成java文档命令 classpath 类路径 Version  版本 author  作者 public  公共的 class  类 static  静态的 void  没有返回值 String  字符串类 System  系统类 out  输出 print  同行打…

# coding: utf-8 #!/usr/bin/env python from __future__ import absolute_import from __future__ import print_function import traceback import argparse import ipaddress from binascii import hexlify import socket import struct import sys import dpkt impor…

用法:python extract_tls_flow.py -vr  white_pcap/11/2018-01-10_13-05-09_2.pcap  -o pcap_ssl_flow.txt  >log.txt python dpkt解析ssl流,记录含有client hello到app data的完整ssl 流,同时记录ssl证书: #!/usr/bin/env python from __future__ import absolute_import from __future__ im…

度度熊的交易计划 Time Limit: 12000/6000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1192    Accepted Submission(s): 440 Problem Description 度度熊参与了喵哈哈村的商业大会,但是这次商业大会遇到了一个难题: 喵哈哈村以及周围的村庄可以看做是一共由n个片区,m条公路组成的地区. 由于生产能力的区别,第i…