History repeat itself Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4342 Description Tom took the Discrete Mathematics course in the 2011,but his bad attendance angered Professor Lee who is in…

History repeat itself Time Limit: 1000ms Memory Limit: 32768KB This problem will be judged on HDU. Original ID: 434264-bit integer IO format: %I64d      Java class name: Main Prev Submit Status Statistics Discuss Next Type: None   None Graph Theory 2…

题目链接:hdu 4342 History repeat itself 题意: 让你找第a个非完全平方数m,并且求前m个数的开方向下取整的和. 题解: 第一个问题: 假设第a个非平方数是X,X前面有n个平方数,则n*n<X<(n+1)*(n+1); n*n前面的非平方数的个数是n*n-n; 首先先根据a求n,n是满足不等式  n*n-n<a的最大正整数. 不等式的解是: (1+sqrt(1+4*a))/2;必需对这个数上取整,然后减一就是n了. 然后第a个非平方数就是  n*n+(a-n…

BUPT2017 wintertraining(15) #8C 题意 求第n(n<2^32)个非完全平方数m,以及\(\sum_{i=1}^m{\lfloor\sqrt i\rfloor}\) 题解 设1~m中有x个完全平方数(\(1^2,2^2,3^2,...,x^2\)). 那么有 \[ \begin{cases} n+x=m\\ x^2 < m\\ (x+1)^2 \ge m \end{cases} \] 等价于求满足\(m-\sqrt m < n\)的m的最大值. 于是可以二分.…

题目传送门 题意:计算从1开始到第n个非完全平方数的开方和 分析:设第n个非完全平方数的值为a,x * x < a < (x+1) * (x+1),而且易得(tmp = sqrt (a) ) == x,a之前的非完全平方数的个数为a - tmp,所以可以二分查找a - tmp == n的a,然后模拟一下能计算出前a个数的开方和 收获:二分查找是个好方法 代码: /************************************************ * Author :Running…

C - History repeat itself Time Limit:1000MS     Memory Limit:32768KB      Description Tom took the Discrete Mathematics course in the 2011,but his bad attendance angered Professor Lee who is in charge of the course. Therefore, Professor Lee decided t…

以下資料的整理主要是做備忘錄,避免以後忘了,順便留給需要的人. ========================================== 本文主要是參考友晶科技的DE2i-150光碟裡面的PCie_Fundmental範例,再重新打造一個新的範例程式. // ============================================================================ // Copyright (c) 2012 by Terasic Tech…

原文: http://www.vogella.com/articles/JavaPersistenceAPI/article.html Lars Vogel Version 2.2 Copyright © 2008, 2009, 2010, 2011, 2012 Lars Vogel 16.03.2012 Revision History Revision 0.1 03.02.2008 LarsVogel Created Revision 0.2 - 2.2 29.09.2008 - 16.03…

Deep Learning in a Nutshell: History and Training This series of blog posts aims to provide an intuitive and gentle introduction to deep learning that does not rely heavily on math or theoretical constructs. The first part in this series provided an…

HTML5 History API提供了一种功能,能让开发人员在不刷新整个页面的情况下修改站点的URL.这个功能很有用,例如通过一段JavaScript代码局部加载页面的内容,你希望通过改变当前页面的URL来反应出页面内容的变化,这时该功能可以派上用场. 举个例子,当用户从首页进入帮助页面时,我们通过Ajax来加载帮助页面的内容.然后这个用户又转到产品页面,我们需要再一次通过Ajax请求来替换页面的内容.当用户想分享页面的URL时,通过History API,我们可以改变页面的URL来反应内容的…

HTML4中的History API history这个东西大家应该都不陌生,我们经常使用history.back(-1)来实现后退功能,具体的属性和方法如下: 属性 length 历史的项数.JavaScript 所能管到的历史被限制在用浏览器的“前进”“后退”键可以去到的范围.本属性返回的是“前进”和“后退”两个按键之下包含的地址数的和. 方法 back() 后退,跟按下“后退”键是等效的. forward() 前进,跟按下“前进”键是等效的. go() 用法:history.go(x):在…

C#编码规范   1  规范目的 ……………………………………………………… 3 2  适用范围 ……………………………………………………… 3 3  代码注释 ……………………………………………………… 3 3.1    代码注释约定............................................ 3 3.2    模块头部注释规范...................................... 3 3.3    方法注释规范................…

原文地址:http://www.osyunwei.com/archives/7378.html 搬运是为了自己找资料方便. 准备篇 一.环境说明: 操作系统:Windows Server 2012 R2 PHP版本:php 5.5.8 MySQL版本:MySQL5.6.15 二.相关软件下载: 1.PHP下载地址: http://windows.php.net/downloads/releases/php-5.5.8-nts-Win32-VC11-x86.zip 2.MySQL下载地址: htt…

I have tried to assemble together information about the Visual C++ releases, the compiler and the frameworks (MFC and ATL). You can find these on many places, but it is often incomplete or focused on something particular (Visual Studio, C++ compiler,…

表现 如果你使用chrome或者firefox等浏览器访问本博客.github.com.plus.google.com等网站时,细心的你会发现页面之间的点击是通过ajax异步请求的,同时页面的URL发生了了改变.并且能够很好的支持浏览器前进和后退. 是什么有这么强大的功能呢? HTML5里引用了新的API,history.pushState和history.replaceState,就是通过这个接口做到无刷新改变页面URL的. 与传统的AJAX的区别 传统的ajax有如下的问题: 1.可以无刷新…

http://blog.danskingdom.com/using-msbuild-to-publish-a-vs-2012-ssdt-sqlproj-database-project-the-same-way-as-a-vs-2010-dbproj-database-project/ Post and code updated on March 21, 2013, and again on March 22, 2013. We recently upgraded from VS (Visual…

准备篇 一.环境说明: 操作系统:Windows Server 2012 R2 PHP版本:php 5.5.8 MySQL版本:MySQL5.6.15 二.相关软件下载: 1.PHP下载地址: http://windows.php.net/downloads/releases/php-5.5.8-nts-Win32-VC11-x86.zip 2.MySQL下载地址: http://cdn.mysql.com/Downloads/MySQLInstaller/mysql-installer-com…

http://en.wikipedia.org/wiki/Order-independent_transparency Order-independent transparency From Wikipedia, the free encyclopedia     The importance of blending order. The top produces an incorrect result with unordered alpha blending, while the botto…

在CentOS6.5下将自带的python2.6升级到python2.7,并安装了ipython,启动ipython后显示如下信息: WARNING: IPython History requires SQLite, your history will not be saved 解决方法如下: 下载并解压sqlite包,输入命令:#wget http://www.sqlite.org/sqlite-autoconf-3071401.tar.gz#tar zxvf sqlite-autoconf-…

When you are using Linux command line frequently, using the history effectively can be a major productivity boost. In fact, once you have mastered the 15 examples that I’ve provided here, you’ll find using command line more enjoyable and fun. 1. Disp…

尽 管是上面讲到的<JavaScript高级程序设计>(第二版)中提到,BOM中的location.path/query…… (window.location)在通过JavaScript更改以后,浏览器都会通过刷新来到达你更改后的URL(location的意思就是位 置..) 而在JavaScript MVC开始流行之后,通过刷新来修改URL的方法,不禁让人感到烦躁.然而HTML5中就制定了一个这样的API,可以通过方法的方式来修改URL,而又不会使浏览器刷新,就是History API. 熟…

<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="keywords" content="周记[学校晚会篇]" /><meta name="description" con…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4464 Problem Description One day when you are going to clear all your browsing history, you come up with an idea: You want to figure out what your most valued site is. Every site is given a value which e…

Abstract Our dating site introduced scoring and its related functionalities innovatively, conforming to people's natural inclination to score people of the other sex, while other sites simply ignored. In addition, we use the 2012 Nobel Laureate El Ro…

原文 Installing IIS 8.5 on Windows Server 2012 R2 Introduction This document describes how to install Internet Information Services (IIS) 8.5 on Windows Server® 2012 R2. IIS is the Web server role in Windows Server 2012 R2. The Windows Server 2012 R2 o…

表现 如果你使用chrome或者firefox等浏览器访问本博客.github.com.plus.google.com等网站时,细心的你会发现页面之间的点击是通过ajax异步请求的,同时页面的URL发生了了改变.并且能够很好的支持浏览器前进和后退. 是什么有这么强大的功能呢? HTML5里引用了新的API,history.pushState和history.replaceState,就是通过这个接口做到无刷新改变页面URL的. 与传统的AJAX的区别 传统的ajax有如下的问题: 1.可以无刷新…

Conquer a New Region Time Limit: 5 Seconds      Memory Limit: 32768 KB The wheel of the history rolling forward, our king conquered a new region in a distant continent. There are N towns (numbered from 1 to N) in this region connected by several road…

Versions and Features Hadoop has seen significant interest over the past few years. This has led to a proportional uptick in features and bug fixes. Some of these features were so significant or had such a sweeping impact that they were developed on…

New xSQL Schema Compare - version 5 Compare the schemas of two SQL Server databases, review differences, generate synchronization script and execute it - xSQL Schema Compare makes database change management easy. xSQL Schema Compare supports SQL Serv…

HTML5 History API提供了一种功能,能让开发人员在不刷新整个页面的情况下修改站点的URL.这个功能很有用,例如通过一段JavaScript代码局部加载页面的内容,你希望通过改变当前页面的URL来反应出页面内容的变化,这时该功能可以派上用场. 举个例子,当用户从首页进入帮助页面时,我们通过Ajax来加载帮助页面的内容.然后这个用户又转到产品页面,我们需要再一次通过Ajax请求来替换页面的内容.当用户想分享页面的URL时,通过History API,我们可以改变页面的URL来反应内容的…