Optimal Milking Time Limit: 2000MS Memory Limit: 30000K Total Submissions: 13968 Accepted: 5044 Case Time Limit: 1000MS Description FJ has moved his K (1 <= K <= 30) milking machines out into the cow pastures among the C (1 <= C <= 200) cows.…

Pots Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 11885 Accepted: 5025 Special Judge Description You are given two pots, having the volume of A and B liters respectively. The following operations can be performed: FILL(i) fill the pot i…

Drainage Ditches Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 8861    Accepted Submission(s): 4141 Problem Description Every time it rains on Farmer John's fields, a pond forms over Bessie's…

Description 上次Gardon的迷宫城堡小希玩了很久(见Problem B),现在她也想设计一个迷宫让Gardon来走.但是她设计迷宫的思路不一样,首先她认为所有的通道都应该是双向连通的,就是说如果有一个通道连通了房间A和B,那么既可以通过它从房间A走到房间B,也可以通过它从房间B走到房间A,为了提高难度,小希希望任意两个房间有且仅有一条路径可以相通(除非走了回头路).小希现在把她的设计图给你,让你帮忙判断她的设计图是否符合她的设计思路.比如下面的例子,前两个是符合条件的,但是最后一个…

Mad scientist Mike has constructed a rooted tree, which consists of n vertices. Each vertex is a reservoir which can be either empty or filled with water. The vertices of the tree are numbered from 1 to n with the root at vertex 1. For each vertex, t…

Sum Problem Time Limit: 1000/500 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 338086    Accepted Submission(s): 85117 Problem Description Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge). In this pro…

从Python 2.4开始,Python引入subprocess模块来管理子进程,以取代一些旧模块的方法:如 os.system.os.spawn.os.popen.popen2.commands. 不但可以调用外部的命令作为子进程,而且可以连接到子进程的input/output/error管道,获取相关的返回信息. subprocess包中定义有数个创建子进程的函数,这些函数分别以不同的方式创建子进程,所以我们可以根据需要来从中选取一个使用.另外subprocess还提供了一些管理标准流(st…

如果愿意在Linux环境方面花费些时间,首先就应该知道日志文件的所在位置以及它们包含的内容.在系统运行正常的情况下学习了解这些不同的日志文件有助于你在遇到紧急情况时从容找出问题并加以解决. 以下介绍的是20个位于/var/log/ 目录之下的日志文件.其中一些只有特定版本采用,如dpkg.log只能在基于Debian的系统中看到. /var/log/messages - 包括整体系统信息,其中也包含系统启动期间的日志.此外,mail,cron,daemon,kern和auth等内容也记录在var…

1.case 脚本: #!/bin/bash #a test about case case $1 in "lenve") echo "input lenve";; "hello") echo "input hello";; [a-zA-Z]) echo "It's a letter";; [0-9]) echo "It's a number";; esac 执行效果: 2.while…

iOS中原生的SQLite API在使用上相当不友好,在使用时,非常不便.于是,就出现了一系列将SQLite API进行封装的库,例如FMDB.PlausibleDatabase.sqlitepersistentobjects等,FMDB (https://github.com/ccgus/fmdb) 是一款简洁.易用的封装库,这一篇文章简单介绍下FMDB的使用. 在FMDB下载文件后,工程中必须导入如下文件,并使用 libsqlite3.dylib 依赖包. FMDB同时兼容ARC和非ARC工…

UILabel:标签 继承自UIView ,在UIView基础上扩充了显示文本的功能.(文本框) UILabel的使用步骤 1.创建控件 UILabel *aLabel=[[UILabel alloc]initWithFrame:CGRectMake(10, 100, 300, 100)]; 2.设置属性 (1).设置背景颜色 aLabel.backgroundColor=[UIColor cyanColor]; (2)设置文本 aLabel.text=@"fuck you艹你❤️❤️❤️❤️❤…

实验简单来讲就是 1. put 一个600M文件,分散3个replica x 9个block 共18个blocks到4个datanode 2. 我关掉了两个datanode,使得大部分的block只在一个datanode上存在,但因为9个很分散,所以文件能正确取回(靠的是checksum来计算文件值) 3. hadoop namenode很迅速的复制了仅有一个replica的block使之成为 3 replica(2) but only found 2 4. 我再关掉一个datanode,结果发…

转载自:http://blog.csdn.net/woohello/article/details/7621651 有时写文档时需要将代码粘贴到word中,但直接粘贴到word中的代码虽能保持换行与缩进等格式,但在一般代码编辑工具中的关键字高亮功能却无法实现,即粘贴到word中的代码不在具有丰富的色彩.使用一款免费软件--notepad++即可实现将关键字高亮的代码粘贴到word中. 首先用notepad++打开源代码文件.notepad++能识别C/C++.Java.matlab等多种语言的源…

c++map的用法 分类: 资料 2012-11-14 21:26 10573人阅读 评论(0) 收藏 举报 最全的c++map的用法 此文是复制来的0.0 1. map最基本的构造函数: map<string ,int>mapstring; map<int,string >mapint; map<sring,char>mapstring; map< char ,string>mapchar; map<char,int>mapchar; map&…

sscanf 其实很强大 分类: 纯C技术 技术笔记 2010-03-05 16:00 12133人阅读 评论(4) 收藏 举报 正则表达式stringbuffercurlgoogle 最近在做日志分析,linux C 的开发环境,在对每行日志进行处理的时候,手下一个小伙用的是逐字节拆分成字段. 刚开始没注意,后来每天10几G的日志上来后,发现除了速度特别慢以外,还经常出问题,遇到错误格式的日志就直接崩溃... 拿过来帮他改的时候,觉得这里完全可以用sscanf来进行处理,于是google+ma…

Ombrophobic Bovines Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 16539 Accepted: 3605 Description FJ's cows really hate getting wet so much that the mere thought of getting caught in the rain makes them shake in their hooves. They have…

Network Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 14721 Accepted: 5777 Special Judge Description Andrew is working as system administrator and is planning to establish a new network in his company. There will be N hubs in the company…

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…

PIGS Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 18209 Accepted: 8277 Description Mirko works on a pig farm that consists of M locked pig-houses and Mirko can't unlock any pighouse because he doesn't have the keys. Customers come to th…

Shuffle'm Up Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 7529 Accepted: 3466 Description A common pastime for poker players at a poker table is to shuffle stacks of chips. Shuffling chips is performed by starting with two stacks of pok…

Play on Words Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 10620 Accepted: 3602 Description Some of the secret doors contain a very interesting word puzzle. The team of archaeologists has to solve it to open that doors. Because there is…

Door Man Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 2476 Accepted: 1001 Description You are a butler in a large mansion. This mansion has so many rooms that they are merely referred to by number (room 0, 1, 2, 3, etc-). Your master is…

Drainage Ditches Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 62016 Accepted: 23808 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 wate…

Network Saboteur Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 10147 Accepted: 4849 Description A university network is composed of N computers. System administrators gathered information on the traffic between nodes, and carefully divid…

I am going to my home. There are many cities and many bi-directional roads between them. The cities are numbered from 0 to n-1 and each road has a cost. There are m roads. You are given the number of my city t where I belong. Now from each city you h…

DZY Loves Chemistry time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output DZY loves chemistry, and he enjoys mixing chemicals. DZY has n chemicals, and m pairs of them will react. He wants to pou…

4 Values whose Sum is 0 Time Limit: 15000MS Memory Limit: 228000K Total Submissions: 17875 Accepted: 5255 Case Time Limit: 5000MS Description The SUM problem can be formulated as follows: given four lists A, B, C, D of integer values, compute how man…

Squares Time Limit: 3500MS Memory Limit: 65536K Total Submissions: 17462 Accepted: 6634 Description A square is a 4-sided polygon whose sides have equal length and adjacent sides form 90-degree angles. It is also a polygon such that rotating about it…

Time Limit:3000MS Memory Limit:65536KB 64bit IO Format:%I64d & %I64u Submit Status Practice POJ 2406 Appoint description: Description Given two strings a and b we define a*b to be their concatenation. For example, if a = "abc" and b = "…

Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 9971   Accepted: 3347 Description The Borg is an immensely powerful race of enhanced humanoids from the delta quadrant of the galaxy. The Borg collective is the term used to describe the gr…