ZOJ--1654 -- Place the Robots [maximum bipartite matching], robots
Link:Http://acm.zju.edu.cn/onlinejudge/showProblem.do? ProblemId = 654
Question:Robert is a famous engineer. One day, his boss assigned him a task. The background of the task is: Given a map of m × n size, the map consists of squares, there are three kinds of squares in the map-walls, lawns and open spaces, his boss hopes to put as many
Baidu has never been able to crawl it since it used qiniu cloud's Robots. The diagnosis shows that robots is disabled. In robots, I use the default one provided by qiniu cloud. What's wrong?
Baidu has never been able to crawl it since it used qiniu cloud's Robots. The diagnosis shows that
To be honest, do the site for so long, what kind of things have been encountered, the most common is also the most let the webmaster headache is nothing but the site down the right, the main site key words down, the site snapshots do not update, the number of chain reduction and so on, these problems are often due to the initial stage of the preparatory work did not do, Caused by the late modification of the site plate or some other places, then today I and his family to discuss the changes in t
To do the site has been done for such a long time, webmaster can encounter things have met, the most common is nothing but the site is down right, the site snapshot does not update the main keyword rankings decline, and the number of outside chain to reduce, and so on, these problems are often due to the initial preparation of the site is not ready on the line results, Lead to the late replacement of the site plate or frequent changes to other spiders often crawling files caused by today's small
For website administrators and content providers, there are sometimes some website content that they do not want to be crawled by robots. To solve this problem, the robots Development Community provides two methods: robots.txt and the robots meta tag.
I. robots.txt
1. What is robots.txt?
Robots.txt is a plain text file that declares that the website does not wan
http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=654Title Description:Robert is a well-known engineer. One day, his boss assigned him a task. The background of the task is: given aA map of the size of MXN, the map is made up of squares, there are 3 kinds of squares in the map-walls, meadows and open space, his boss wantsCan place as many robots as possible in the map. Each robot is equipped with a laser gun that can be in four directions at
, should be written: disallow: *. Html.
Sometimes we write these rules may have some not noticed the problem, now can through Baidu Webmaster Tools (zhanzhang.baidu.com) and Google Webmaster tools to test. Relatively speaking, Baidu Webmaster tools are relatively simple tools:
The Baidu robots tool can only detect whether each line command conforms to grammatical rules, but does not detect actual effects
We know that search engines have their own "search bots", and they build their own databases by constantly crawling information on the web along the pages of links (typically HTTP and src links). for Web site managers and content providers, sometimes there will be some site content, do not want to be crawled by robots and open. To solve this problem, the robots development community offers two options: one
support nofollow, but still support the robots, the preparation of the appropriate robots can also solve the problem of Baidu cannot be resolved spam, that is, the links are directed to a designated directory, and then disallow this directory in a robots, you can let Baidu does not index, So that spam will not be harassed again.
If you are also using the Z-blog
SEO optimization technology is not only in the content and outside the chain, more importantly, some of the details of the processing, because the content and outside the chain need to master the main points is not many, and easy to operate, easy to understand, while the site optimization of other details of the treatment, relatively less often contact, for these know very little, Really want to deal with a lot of problems, such as SEO optimization of the regular 404-page production, 301 redirec
Using Urllib's Robotparser module, we can realize the analysis of website Robots protocol.1. Robots AgreementRobots protocol is also called the Crawler Protocol, the robot protocol, the full name of the web crawler Exclusion standard, used to tell the crawler can search engine which pages can be crawled, which is not, usually a text file called robots.txt, generally placed in the root directory of the siteW
Introduction to robots.txtRobots.txt is a plain text file in which the website administrator can declare that the website does not want to be accessed by robots, or specify a search engine to include only specified content.
When a search robot (called a search spider) crawls a site, it first checks that the site root directory contains robots.txt. If so, the search robot determines the access range based on the content in the file. If the file does no
We know that search engines have their own "search bots", and they build their own databases by constantly crawling information on the web along the pages of links (typically HTTP and src links).
For web site managers and content providers, sometimes there will be some site content, do not want to be crawled by robots and open. To solve this problem, the robots development community offers two options: one
user's heart rate, diet, exercise, sleep and other monitoring, and then collect the elderly and the patient's physiological data for professional medical institutions to provide reference services To improve the health management of the elderly and patients, especially for the elderly who are suffering from a gradual decline in the body's organs, this intelligent medical treatment can help them and prevent disease outbreaks, and good management of chronic disease.And with the advent of intellig
Robots.txt GuideWhen a search engine accesses a Web site, it first checks to see if there is a plain text file called robots.txt under the root domain of the site. The Robots.txt file is used to limit the search engine's access to its Web site, which tells the search engine which files are allowed to be retrieved (downloaded). This is what you often see on the web, "reject the standard of the Robots" (Exclusion Standard). Below we refer to res for sho
In fact, Quanzhou, SEO alone before the Shanhui teacher's "se actual password", which said the robots.txt just, personal feeling or very detailed, and did not study the large web site are how to set up, today think of, to analyze the domestic microblogging Sina, Tencent, Sohu, NetEase 4 Big Platform respective robots.txt file setting, how to write a robots.
1. Sina Weibo
Description: Allow all search engines to crawl
2. Tencent Weibo
The Robots.txt file seems to have only a few lines of letters, but in fact there are many details that need our attention. Because if you do not pay attention to these details, some statements will not be effective, or even have a hair effect. and Robots.txtt file is the search engine into our site after the first access to the file, its written good is related to the site's SEO can be carried out smoothly. The following is an example of three errors in the details that are easy to appear when r
Robots
Time Limit: 1000MS
Memory Limit: 10000K
Total Submissions: 4037
Accepted: 1845
DescriptionYour Company provides robots, can be used to pick up litter from fields after sporting events and concerts. Before robots was assigned to a job, an aerial photograph of the field was marked with a grid. E
Crashing Robots
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 8424
Accepted: 3648
DescriptionIn a modernized warehouse, robots is used to fetch the goods. Careful planning is needed to ensure, the robots reach their destinations without crashing into each of the other. Of course, all war
Crashing robots
Time limit:1000 ms
Memory limit:65536 K
Total submissions:7505
Accepted:3279
DescriptionIn a modernized warehouse, robots are used to fetch the goods. careful planning is needed to ensure that the robots reach their destinations without crashing into each other. of course, all warehouses are rectangular, and
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