best 2fa solution

The chain list solution, array solution and mathematical formula solution of Joseph RingJoseph Ring (Josephus) was raised by ancient Roman historian Joseph Josephus, who participated in and recorded the uprising of the Jews against Rome in the year 66-70. Joseph, as a general, managed to hold the city of Juda for 47 days, and after the fall of the city, he and 40

Ultra-full css solution-text-and-text hybrid layout solution and css SolutionMethod 1: Background Image This method is applicable to non-dynamic content, where images are used for decoration. It is mainly to set the padding width of the parent element to the width of the background image plus the padding of the text, and then locate the background image to the padding.Demo1 is a mix of text and text, and th

/* Original Problem Monkey: There is a pile of peaches on the beach, five monkeys to score.The first monkey put the pile of peaches into five, one more, the monkey threw a lot of one into the sea, took a copy.The second monkey divided the remaining peaches into five, and one more, it also threw more than one into the sea, took a copy,Third, four, fifth monkeys do this,Ask:At least a few peaches on the beach. Expand the problem monkey: there is a pile of peaches on the beach, there are n monkeys

(1) O (n) Time Solution Only the last person out of the game can be solved, that is, the last person left behind. By default, the number starts from 1. N people eat at a round table, and each M person kills one until the last one is left.Who are the last to be asked? Mark the person as 0, 1, 2,..., n-1, respectively, to obtain a completely residual system of N.The following recursive formula is available:/-(J (n-1, m) + m + 1) mod N, when n> 1J (n, m

DNS Positive Solution zone fileIn DNS, we know that there is the concept of domain and region, the English name of the domain is domains, it is a logical concept, and the region English full name zone, it is a physical concept. And zone is divided into positive solution area and inverse solution area.Positive Solution

1 var New Checkboard (8);//Initialize the chessboard for 8 Queens 2 check.getresult (0); The parameter represents 3 console.log (check.result.length) starting from the No. 0 step;//All qualifying paths are saved in the array result //Result: 92 Solution (There are 92 solutions to the problem of---8 queens)1 //N Queen problem source code----(JavaScript language)2 //define the location of each node3 varNode =function(i, j) {4 This. i =i;5

0.http://blog.csdn.net/flyyhz/article/details/771002431.2.3.4.5.6.7.8.9. Today on Linux installed MySQL, but found in the local login can, but remote login but error Host is not allowed to connect to thismysqlserver , find a half-day to try some of the online methods are not resolved, and finally found a solution in an article, deliberately recorded. First of all, the error is that our MySQL is not allowed to Telnet, so telnet failed, th

Since there is a firewall enabled when adding a Linux host, there are two ways to troubleshoot Linux hosts because of the inability to monitor Linux hosts:This command can be executed by the monitoring host: Snmpwalk-c public-v 2c 192.168.100.244 indicates the ability to receive data information from the monitored machineOne, effective in time, but restarting the server will have to be added to the rule againIptables-i input-p UDP--dport 161-j ACCEPTTwo, permanent entry in Vi/etc/sysconfig/iptab

recording of response time. Provide statistical data for program tuning and scaling. Message Queuing Platform Message Queuing employs Kafka technology, Kafka is a highly-throughput distributed subscription message system that handles all the action flow data in a consumer-scale web site. Mainly used for: -Message communication between services to achieve complete business logic. -Provide queue services for large concurrent business to avoid service crashes under large concurrency. Distributed F

. Finally, discussion with the students and online access to get two solutions, one is the dichotomy to find the repetition number, the complexity O (NLOGN), the other is the mapping method + fast pointer, complexity O (n). Dichotomy O (NLOGN) If no elements are duplicated, the number of elements on the left and right sides of the N/2 should be equal. Based on this idea, for 1-n, iterate over this array, record the number of elements less than or equal to N/2, if greater than N/2, the number of

The first time to write a blog, have any questions or ideas of the hope that you can make comments to exchange, hope that we forgive!The problem is that there are errors in the new project, there are red lines and workarounds below SUPPORT_V7 and why Project inheritance in Eclipse actionbaractivity:Mainly in front of the development of the time encountered this problem, yesterday there is an Android group inside people asked me how to solve this problem, I also Baidu a lot of methods, found that

Label:Now in the SharePoint 2007 system, if we want to install the customized code into the system, we have to make a solution package (solution), and then in the central management of the system in the back of the console, the entire server farm was released. The best way to use the solution package is to solution the

SharePoint sandbox Solution VS field solution, sharepoint sandboxBlog address ghost. Although the sandbox solution has been rejected and abandoned (replaced by an APP) in the latest SharePoint development, I think some simple things are useless, for example, the scenario mentioned in the article of Yu. For details, see "select the correct API set in SharePoint 20

dangerous to know half the solution (a little learning is a dangerous thing) C ++: In three days, you can learn the C ++ syntax (if you already have a similar language), but you cannot learn how to use it. In short, if you are, for example, a basic programmer, you can learn to write a basic-style program in C ++ syntax, but you cannot learn the true advantages (and disadvantages) of C ++ ). Where is the key? Alan Perlis (first Chairman of ACM, winn

Let's talk about a solution to a problem that many beginners (such as me) encounter. of course, this solution leads to another problem !! Everybody (Super beginners), have you ever tried php and cannot parse it, that is, php files opened in a browser, and the html content in it can be parsed and displayed normally, however, the php code can only be used as a solution