freecodecamp medium

Index: [Leetcode] leetcode key index (C++/JAVA/PYTHON/SQL)Github:https://github.com/illuz/leetcode035. Search for a Range (Medium)links：Title: https://leetcode.com/problems/search-for-a-range/Code (GitHub): Https://github.com/illuz/leetcodeTest Instructions：Finds a range of numbers in an ordered array. (as a result of repeated)Analysis：Or two-point search variants. (c + +) directly with C + + STL lower_bound and upper_bound lazy. (Java) c

Unit 6th Job "2"-online programming (difficulty: Medium)View HelpreturnWarm tips:1. This assignment belongs to the online Judge topic and is enigmatic grading by the system immediately after Submission.2. Students can submit an unlimited number of answers before the deadline , and the system will take the highest score as the final Result. The inheritance relationship between classes is implemented on the basis of unit 5th job "4" and the code of "1"

Media e-Commerce team to undertake small and medium-sized web mobile projects.1, to undertake business: micro-live, shake a shake, H5 games, conference, community, red envelopes, distribution mall and so on.2, Contact: No.: xie9650, Mobile: 18613954008, specific interview.This article is from "Phper Xuchen-Focus on PHP Technology" blog, be sure to keep this source http://xuqin.blog.51cto.com/5183168/1884196Media e-Commerce team to undertake small and

Index: [Leetcode] leetcode key index (C++/JAVA/PYTHON/SQL)Github:https://github.com/illuz/leetcode018.4Sum (Medium)links：Title: https://oj.leetcode.com/problems/4sum/Code (GitHub): Https://github.com/illuz/leetcodeTest Instructions：Give a sequence S, find out four numbers a,b,c,d make a + b + c + d = target .Analysis： With the previous 2Sum, 3Sum and 3Sum Closest the same practice, first sort, then left and right clamping force, complexity O

Index: [Leetcode] leetcode key index (C++/JAVA/PYTHON/SQL)Github:https://github.com/illuz/leetcode017.letter_combinations_of_a_phone_number (Medium)links：Title: https://oj.leetcode.com/problems/letter-combinations-of-a-phone-number/Code (GitHub): Https://github.com/illuz/leetcodeTest Instructions：Press the letter on the phone, give the number of press keys, and ask all the letters by the case.Analysis：DFS used to be a more relaxed way of writing.Code：

Index: [Leetcode] leetcode key index (C++/JAVA/PYTHON/SQL)Github:https://github.com/illuz/leetcode003.longest_substring_without_repeating_characters (Medium)links：Title: https://oj.leetcode.com/problems/Longest-Substring-Without-Repeating-Characters/Code (GitHub): Https://github.com/illuz/leetcodeTest Instructions：You can tell from the title that test instructions is the longest substring in a string that does not contain duplicate characters.Analysis

Index: [Leetcode] leetcode key index (C++/JAVA/PYTHON/SQL)Github:https://github.com/illuz/leetcode029. Divide, integers (Medium)links：Title: https://oj.leetcode.com/problems/divide-two-integers/Code (GitHub): Https://github.com/illuz/leetcodeTest Instructions：To achieve division, you cannot use multiply, divide, and modulo.Analysis：You can't use multiply, divide, and modulo, and the rest, plus, minus, and bitwise operations. Will think of is

Index: [Leetcode] leetcode key index (C++/JAVA/PYTHON/SQL)Github:https://github.com/illuz/leetcode024. Swap Nodes in Pairs (Medium)links：Title: https://oj.leetcode.com/problems/swap-nodes-in-pairs/Code (GitHub): Https://github.com/illuz/leetcodeTest Instructions：Swap each pair of nodes in a list (not just the value).Analysis：Direct simulation can be done.It would be convenient to open a front node to do it.It is convenient to use Python for exception

Text: Step by step Write algorithm (the string lookup medium)"Disclaimer: Copyright, welcome reprint, please do not use for commercial purposes. Contact mailbox: feixiaoxing @163.com "Yesterday we wrote a simple character lookup function. Although relatively simple, but also can be used. However, after careful analysis, there is room for improvement in such a simple function. Where do you improve it? Everybody can look down slowly.The following code i

Baidu bidding is more than the choice of network promotion methods, but small and medium-sized enterprises use Baidu Bidding is often not very ideal investment, today and you share some of Baidu bidding skills. Baidu's bid ranking title and description can be based on the content of the Web page, in accordance with the relevant requirements by your own writing, to write the attractive, so that customers look at the feeling that he needs, so he has to

Firewalls are common, but not readily available. When it comes to security refinement analysis, the gateway based firewall is best, followed by the stateful detection firewall, but the stateful detection firewall provides the weakest security processing capability. However, in terms of manageability, the order is just the opposite: stateful detection firewalls have the best "plug and Play" and the weakest application agent firewall. So how do you know what kind of firewall is right for your netw

css| style Sheet 　　Style sheet (css:cascading style Sheets) learning [top] Seven CSS1 Property 3 . 1 Font properties type, font style, font size, font effect, and so on. Common properties are: ①font-family: Font, cursive, fantasy, comic Sans Ms. ②font-size: Font physical size or relative size, physical size includes: Xx-small, X-small, small, medium, large, X-large, Xx-large, respectively corresponding to the 1~7 font. ③font-style: Itali

"Wireless network communication" has been regarded as the representative of High-tech technology, but also many people think that a small number of rich can enjoy the special services. In fact, the rapid development of the IT industry, the increase in personal computers makes "wireless network" become a lot of civilians, without the amount of silver can build their own wireless network. Now we're going to introduce how to build a corporate wireless network. First of all, we have to understand t

minimum. Small and medium-sized enterprises for the enterprise's mail system four basic requirements: one is based on their own domain name, the second is low maintenance costs, three is stable; four is strong characteristics, strong characteristics refers to the hope that manufacturers can provide such as anti-virus, anti-spam and other functions. In function, the mail system of small and medium-sized e

most important thing is not functional use it Why not k8s the configmap? We originally wanted to use the k8s configmap to do the configuration center, but not all the projects are running in k8s, and modify the Configmap also need to restart the container to take effect, so there is no use of ETCD Anyone can modify it, feel insecure ah? In fact, we are using the account password authentication, and only in the intranet, limit IP, security point, another solution is to ETCD to go SSL, but

/759569MySQL supports all standard SQL numeric data types. These types include strict numeric data types (INTEGER, SMALLINT, Decimal, and numeric), as well as approximate numeric data types (FLOAT, real, and double PRECISION). The keyword int is a synonym for integer, and the keyword Dec is a synonym for decimal.the bit data type holds the bit field values and supports MyISAM, MEMORY, InnoDB, and BDB tables. as an extension of the SQL standard, MySQL also supports integer types tinyint, Mediumin

Non-generic web programs or products typically do not deal with ASP.net medium security mode because the user community is fixed, or the deployment environment can be determined by the program provider. But in doing general-purpose web products, you have to deal with a variety of people, and some webmaster use foreign space, such as GoDaddy, foreign space merchants will often put ASP.net code execution rights control in the

Price change of residential sales in 70 major cities in May 2015Http://www.stats.gov.cn/tjsj/zxfb/201506/t20150618_1170358.html(a) compared with last month, 70 medium and large cities, the price drop in the city has 43, the rising city has 20, the flat city has 7. In the chain price change, the maximum increase is 6.7%, the lowest is down 0.6%.(b) compared with the same month last year, there were 69 cities in 70 major cities with lower prices, with 1

Basic: fully protect your Java program Security (medium)-General Linux technology-Linux programming and kernel information. The following is a detailed description. Part 2: do not let vulnerabilities endanger application security Overview: in this section of the security discussion, Todd Sundsted discusses application security issues with us. Minor errors in program development can bring great security problems to developers and users. Todd will show

, Ajax synchronous submission is valuable? This is not as good as using a form to do synchronous submission, this to specific problems, I mentioned in the previous traditional synchronous submission of HTTP precision control is very poor, if some synchronization request we need more HTTP control then use AJAX better, in addition to the traditional synchronous request response is to overwrite the original page, It is either a new form to receive the response, but the synchronous Ajax is more flex