[1553] Beautiful Walls 时间限制: 1000 ms 内存限制: 65535 K 问题描述 To simplify the building process, XadillaX built some template on the ground. The template is a very big wall and the height of each unit may be different. 8Mao and Hungar have to choose any par…

Destroy Walls Long times ago, there are beautiful historic walls in the city. These walls divide the city into many parts of area. Since it was not convenient, the new king wants to destroy some of these walls, so he can arrive anywhere from his cast…

HDU 6187 Destroy Walls (思维,最大生成树) Destroy Walls *Time Limit: 8000/4000 MS (Java/Others) Memory Limit: 132768/132768 K (Java/Others) Total Submission(s): 1784 Accepted Submission(s): 692 * Problem Description Long times ago, there are beautiful histor…

这几篇博文只是为了记录学习Beautiful Soup的过程,不仅方便自己以后查看,也许能帮到同样在学习这个技术的朋友.通过学习Beautiful Soup基础知识 完成了一个简单的爬虫服务:从allitebooks.com抓取书籍的书名和每本书对应的ISBN码,然后通过ISBN码去amazon.com抓取对应的价格. 第一部分 Beautiful Soup的基础知识 Beautiful Soup的安装和查找.浏览的方法. 网络爬虫: 从allitebooks.com抓取书籍信息并从amazon…

开始学习网络数据挖掘方面的知识,首先从Beautiful Soup入手(Beautiful Soup是一个Python库,功能是从HTML和XML中解析数据),打算以三篇博文纪录学习Beautiful Soup的过程,第一篇是Beautiful Soup基础知识,后两篇利用前边的Beautiful Soup知识完成一个简单的爬虫,抓取allitebook.com的书籍信息和ISBN码,再根据ISBN码去amazon.com抓取书籍对应的价格. 一.Beautiful Soup简介 网络数据挖掘指…

之前我们从网页中提取重要信息主要是通过自己编写正则表达式完成的,但是如果你觉得正则表达式很好写的话,那你估计不是地球人了,而且很容易出问题.下边要介绍的Beautiful Soup就可以帮你简化这些操作,更加方便的提取网页中信息. Beautiful Soup 3 目前已经停止开发,官方推荐在现在的项目中使用Beautiful Soup 4 Beautiful Soup是有中文文档的,里边有详细的介绍,文档地址是: https://www.crummy.com/software/Beautifu…

前言:这几天忙着写分析报告,实在没精力去研究django,虽然抽时间去看了几遍中文文档,还是等实际实践后写几篇操作文章吧! 正文:以下是本人前段时间学习bs4库找的一些网址,在学习的可以参考下,有点多,就不啰嗦了! 点击url左侧文字直接进入相关网页 点击url左侧文字直接进入相关网页 点击url左侧文字直接进入相关网页 BeautifulSoup使用总结:http://blog.chinaunix.net/uid-26722078-id-3519422.html Beautiful Soup…

题目链接 题意:定义"beautiful number"为一个数n能整除所有数位上非0的数字 分析:即n是数位所有数字的最小公倍数的倍数.LCM(1到9)=2520.n满足是2520的约数的倍数.dp[len][val][lcm]一维为数的位数,一维为%2520的值(保存原数不可能,也没必要,2520是可行的最小公倍数最大的一个),一维为当前数位的lcm,判断满足的条件是val%lcm==0.这题离散化2520的约数,否则空间开不下. #include <bits/stdc++.…

Win  10    下python3.6 使用Beautiful Soup  4错误 You are trying to run the Python 2 version of Beautiful Soup under Python 3. This will not work 解决方案: 以管理员运行cmd C:\WINDOWS\system32>pip install beautifulsoup4Collecting beautifulsoup4 Using cached beautiful…

hihoCoder #1425 : What a Beautiful Lake(美丽滴湖) 时间限制:1000ms 单点时限:1000ms 内存限制:256MB Description - 题目描述 Weiming Lake, also named "Un-named Lake", is the most famous scenic spot in Peking University. It is located in the north of the campus and is su…

如何在Python3.x中使用Beautiful Soup 1.BeautifulSoup中文文档:http://www.crummy.com/software/BeautifulSoup/bs3/documentation.zh.html 2.BeautifulSoup下载:http://www.crummy.com/software/BeautifulSoup/ 3.解压到Python目录 4.运行cmd执行:python setup.py install即可: 5.使用下面的命令验证是否成…

Beautiful Soup是一个非常流行的Python模块.该模块可以解析网页,并提供定位内容的便捷接口. 使用下面两个命令安装: pip install beautifulsoup4 或者 sudo apt-get install Python-bs4 如果想安装最新的版本,请直接下载安装包来手动安装,也是十分方便的方法. 在这里我安装的是 Beautiful Soup 4.5.1 下载完成之后把解压包放到site-package目录下,cd到解压包中,运行下面的命令即可完成安装: sudo…

4692: Beautiful Spacing Time Limit: 15 Sec  Memory Limit: 128 MBSubmit: 46  Solved: 21[Submit][Status][Discuss] Description 文章是一些单词组成的序列,单词由字母组成.你的任务是将一篇文章的单词填充到一个网格中,其中网格包含W列和足够多的行.为了布局之美,以下限制都需要满足. 1.文章中的文字需要按照原有的顺序放置.下图表示了将4个单词的文章“This is a pen”放入…

hdu4888 Redraw Beautiful Drawings Time Limit: 3000/1500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 2007    Accepted Submission(s): 447 Problem Description Alice and Bob are playing together. Alice is crazy abou…

D. Beautiful numbers time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Volodya is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beautiful if…

[codeforces 55]D. Beautiful numbers 试题描述 Volodya is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beautiful if and only if it is divisible by each of its nonzero digits. We will not argue with this and…

题目链接:http://hihocoder.com/problemset/problem/1061 题目意思:给出一个不超过10MB长度的字符串,判断是否里面含有一个beautiful strings的子串:连续递增且数量相等的字母. 照着题目分析翻译的代码... 分析得很到位呢,大赞 ^_^ http://hihocoder.com/discuss/question/2083 hiho的题目其实挺好的,有专题,有分析,有代码 & 思路参考... 想想出来工作那么久,浮躁的心啊,一个多快两个月没…

199. Beautiful People time limit per test: 0.25 sec. memory limit per test: 65536 KB input: standard output: standard The most prestigious sports club in one city has exactly N members. Each of its members is strong and beautiful. More precisely, i-t…

Walls Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 7677   Accepted: 3719 Description In a country, great walls have been built in such a way that every great wall connects exactly two towns. The great walls do not cross each other. Th…

把数位dp写成记忆化搜索的形式,方法很赞,代码量少了很多. 下面为转载内容:  a positive integer number is beautiful if and only if it is divisible by each of its nonzero digits.    问一个区间内[l,r]有多少个Beautiful数字    范围9*10^18        数位统计问题,构造状态也挺难的,我想不出,我的思维局限在用递推去初始化状态,而这里的状态定义也比较难    跟pre的…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5062 题目意思:给出 N,找出 1 - 10^N 中满足 Beautiful Palindrome Numbers (BPN)的数量有多少. 满足 BPN 的条件有两个:(1)回文串   (2)对称的部分从左到右递增排放. (1)版本 1 (比较麻烦,建议看版本2)        46ms #include <iostream> #include <cstdio> #include &…

Beautiful Soup 是一个可以从HTML或XML文件中提取数据的Python库.它能够通过你喜欢的转换器实现惯用的文档导航,查找,修改文档的方式.Beautiful Soup会帮你节省数小时甚至数天的工作时间. 这篇文档介绍了BeautifulSoup4中所有主要特性,并切有小例子.让我来向你展示它适合做什么,如何工作,怎样使用,如何达到你想要的效果,和处理异常情况. 文档中出现的例子在Python2.7和Python3.2中的执行结果相同 你可能在寻找 Beautiful Soup3…

Python中使用Beautiful Soup库的超详细教程 转 http://www.jb51.net/article/65287.htm 作者:崔庆才 字体:[增加 减小] 类型:转载 时间:2015-04-30我要评论 这篇文章主要介绍了Python中使用Beautiful Soup库的超详细教程,示例代码基于Python2.x版本,极力推荐!需要的朋友可以参考下   1. Beautiful Soup的简介 简单来说,Beautiful Soup是python的一个库,最主要的功能是从网…

D. Beautiful numbers time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output Volodya is an odd boy and his taste is strange as well. It seems to him that a positive integer number is beautiful if…

什么是BeautifulSoup? Beautiful Soup 是用Python写的一个HTML/XML的解析器,它可以很好的处理不规范标记并生成剖析树(parse tree). 它提供简单又常用的导航(navigating),搜索以及修改剖析树的操作.它可以大大节省你的编程时间. 安装Beautiful Soup Beautiful Soup的下载地址:https://www.crummy.com/software/BeautifulSoup/bs4/download/4.4/ 将下载的be…

Beautiful People Time Limit: 10000/5000MS (Java/Others) Memory Limit: 128000/64000KB (Java/Others)     Special Judge SubmitStatus Problem Description The most prestigious sports club in one city has exactly N members. Each of its members is strong an…

C. Beautiful Numbers 题目连接: http://www.codeforces.com/contest/300/problem/C Description Vitaly is a very weird man. He's got two favorite digits a and b. Vitaly calls a positive integer good, if the decimal representation of this integer only contains…

Redraw Beautiful Drawings Time Limit: 3000/1500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Problem Description Alice and Bob are playing together. Alice is crazy about art and she has visited many museums around the world. She has…

原文地址http://blog.csdn.net/watsy/article/details/14161201 先发一下官方文档地址.http://www.crummy.com/software/BeautifulSoup/bs4/doc/ 建议有时间可以看一下python包的文档. Beautiful Soup 相比其他的html解析有个非常重要的优势.html会被拆解为对象处理.全篇转化为字典和数组. 相比正则解析的爬虫,省略了学习正则的高成本. 相比xpath爬虫的解析,同样节约学习时间成…

B. Beautiful Paintings time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output There are n pictures delivered for the new exhibition. The i-th painting has beauty ai. We know that a visitor becomes…