You start with a sequence of consecutive integers. You want to group them into sets. You are given the interval, and an integer P. Initially, each number in the interval is in its own set. Then you consider each pair of integers in the interval. If t…

A prime number p≥2 is an integer which is evenly divisible by only two integers: 1 and p. A composite integer is one which is not prime. The fundamental theorem of arithmetic says that any integer x can be expressed uniquely as a set of prime factors…

Input The first line of input consists of an integers T where 1≤T≤1000, the number of test cases. Then follow T lines, each containing four integers a, n, b, m satisfying 1≤n,m≤10e9, 0≤a<n, 0≤b<m. Also, you may assume gcd(n,m)=1.Output For each test…

Freddy practices various kinds of alternative medicine, such as homeopathy. This practice is based on the belief that successively diluting some substances in water or alcohol while shaking them thoroughly produces remedies for many diseases. This ye…

Input The first line of input contains one integer, giving the number of operations to perform. Then follow the operations, one per line, each of the form x1 y1 op x2 y2. Here, −109≤x1,y1,x2,y2<109 are integers, indicating that the operands are x1/y1…

Given a sequence of positive integers, count all contiguous subsequences (sometimes called substrings, in contrast to subsequences, which may leave out elements) the sum of which is divisible by a given number. These subsequences may overlap. For exa…

The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room numbers on their offices. — It is a matter of security to change such things every now and then, to…

In the game of chess, the queen is a powerful piece. It can attack by moving any number of spaces in its current row, in its column or diagonally. In the eight queens puzzle, eight queens must be placed on a standard 8×8 chess board so that no queen…

The factorial function, n! is defined thus for n a non-negative integer: 0! = 1 n! = n * (n-1)! (n > 0) We say that a divides b if there exists an integer k such that k*a = b Input The input to your program consists of several lines, each containing…

题目意思就是已知n的阶乘,求n. 当输入的阶乘小于10位数的时候,我们可以用long long将字符串转化成数字,直接计算. 而当输入的阶乘很大的时候,我们就可以利用位数去大概的估计n. //Asimple #include <bits/stdc++.h> using namespace std; typedef long long ll; ll n, m, num, res, ans, len;string str; void input() { cin >> str; len…

We say that x is a perfect square if, for some integer b, x = b2. Similarly, x is a perfect cube if, for some integer b, x = b3. More generally, x is a perfect pth power if, for some integer b, x = bp. Given an integer x you are to determine the larg…

首先大概介绍BT网络运行的整体流程: 开始阶段,一个节点加入到网络中,并向tracker节点发送信息,tracker返回若干个邻居的列表 得到列表后,向每个邻居发送bitfiled信息,来获取他们的文件状态.接着确定需要的piece,并向拥有该 piece的邻居发送关注的请求消息.本地节点根据过去20s内邻居节点的带宽传输表现,选出前3,并把它们置为疏通状态,向他们发送块的请求. 当收到请求信息时,返回一个piece信息,注意如果本地节点上传少于10个块,就把当前请求入队,按队列顺序一个个请求处…

Open Method Opens a new window and loads the document specified by a given URL. Navigates the app window to the specified location. 打开一个新窗口并加载由给定的 URL 指定的文档. 导航应用程序窗口到指定的位置的. Syntax 语法:var retval = window.open(url, name, features, replace); Parameter…

http://www.smorgasbork.com/2012/01/04/building-a-custom-centos-6-kickstart-disc-part-1/ Create a directory to mount your source. # mkdir /tmp/bootiso Loop mount the source ISO you are modifying. (Download from Red Hat / CentOS.) # mount -o loop /path…

Directives(指令) Syntax(语法): aio on | off | threads[=pool]; Default: aio off; Context: http, server, location This directive appeared in version 0.8.11. 指令出现在版本0.8.11版本 Enables or disables the use of asynchronous file I/O (AIO) on FreeBSD and Linux: 启用…

IdM服务器是一个集成身份验证服务器. Figure 1.1. The IdM Server: Unifying Services Authentication: Kerberos KDC Kerberos使用对称密钥加密算法生成票据给用户,Kerberos-aware 服务检查票据来验证用户身份. Data Storage: Red Hat Directory Server 目录服务用于存储所有的Kerberos,用户账号,用户组,系统服务,计算机策略,DNS信息以及其他信息. Authent…

Child Process child_process 这个模块可以生成一个子进程.nodejs提供了好几个API,本质上都是调用child_process.spawn(): const spawn = require('child_process').spawn; const ls = spawn('ls', ['-lh', '/usr']); ls.stdout.on('data', (data) => { console.log(`stdout: ${data}`); }); ls.std…

主题链接:http://acm.timus.ru/problem.aspx?space=1&num=1727 1727. Znaika's Magic Numbers Time limit: 0.5 second Memory limit: 64 MB Znaika has many interests. For example, now he is investigating the properties of number sets. Znaika writes down some set…

Nginx 标签 : nginx 代理 代理服务可简单的分为正向代理和反向代理: 正向代理: 用于代理内部网络对Internet的连接请求(如VPN/NAT),客户端指定代理服务器,并将本来要直接发送给目标Web服务器的HTTP请求先发送到代理服务器上, 然后由代理服务器去访问Web服务器, 并将Web服务器的Response回传给客户端: 反向代理: 与正向代理相反,如果局域网向Internet提供资源,并让Internet上的其他用户可以访问局域网内资源, 也可以设置一个代理服务器, 它提供…

Nginx版本:1.9.1 我的博客:http://blog.csdn.net/zhangskd 算法介绍 来看一个简单的Nginx负载均衡配置. http { upstream cluster { server a weight=5; server b weight=1; server c weight=1; } server { listen 80; location / { proxy_pass http://cluster; } } } 当在upstream配置块中没有指定使用的负载均衡…

一. backlog=number sets the backlog parameter in the listen() call that limits the maximum length for the queue of pending connections. By default, backlog is set to -1 on FreeBSD, DragonFly BSD, and macOS, and to 511 on other platforms. (1)net.core.s…

HAProxy原理和配置 目录 1.HAProxy简介 2.haproxy安装和配置说明 proxies配置参数 bind配置 Balance配置 基于cookie的会话绑定 统计接口启用相关的参数 haproxy的工作模式 forwardfor配置 错误页配置 修改报文首部 会话保持 日志系统 acl 1.HAProxy简介 (1)HAProxy 是一款提供高可用性.负载均衡以及基于TCP(第四层)和HTTP(第七层)应用的代理软件,支持虚拟主机,它是免费.快速并且可靠的          一…

Example ConfigurationDirectives     upstream     server     zone     state     hash     least_conn     least_timeEmbedded Variables The ngx_stream_upstream_module module (1.9.0) is used to define groups of servers that can be referenced by the proxy_…

nginx 必须启用 启用 --with-stream 模块. 可下载源码编译. nginx.conf的配置: worker_processes ; events { worker_connections ; } stream { server{ so_keepalive=on; proxy_pass ; proxy_timeout 72h; } } ~ 更一般的写法: worker_processes ; events { worker_connections ; } stream { ups…

环境准备 3台机器,每个机器双网卡,每个机器还需要额外添加1个10GB的磁盘用于测试 机器系统版本是centos6.6 [root@gluster-1-1 ~]# uname -rm 2.6.32-504.el6.x86_64 x86_64 [root@gluster-1-1 ~]# cat /etc/redhat-release CentOS release 6.6 (Final) [root@gluster-1-1 ~]# 3台机器对应关系 10.0.1.151 gluster-1-1 10…

最近工作里遇到一个需求要把之前用Java写的一个http接口替换成用Python写的,出参是带了mybatis pageHelper中PageInfo信息的一个JSON串,而Python这边分页不会涉及到数据库查询,属于直接对list进行分页..然后就有了下面的对开源Python分页模块的一个改写(模块地址:https://github.com/Pylons/paginate).至于改动~~emmm~具体来说,就是加了个元类,给原先的Page类动态加了个返回JSON字符串的方法,至于为什么这里用…

https://nodejs.org/api/child_process.html Node.js v11.1.0 Documentation Index View on single page View as JSON View another version ▼ Edit on GitHub Table of Contents Child Process Asynchronous Process Creation Spawning .bat and .cmd files on Windows…

nginx之proxy反向代理模块: location ^~ /proxy_path/ { root "/www/html"; 这里没必要配置 index index.html; 这里也没必须配置 proxy_pass http://192.168.223.137/; proxy_set_header Host $host:$proxy_port; proxy_set_header X-Real-IP $remote_addr; #proxy_set_header X-Forwarde…

一,操作命令 01,启动gpstart 参数说明 COMMAND NAME: gpstart Starts a Greenplum Database system. ***************************************************** SYNOPSIS ***************************************************** gpstart [-d <master_data_directory>] [-B <para…

Reads Java class and interface definitions and compiles them into bytecode and class files. Synopsis javac [ options ] [ sourcefiles ] [ classes] [ @argfiles ] Arguments can be in any order: options Command-line options. See Options. sourcefiles One…