luhn algorithm

Dijkstra algorithm1. Definition OverviewThe Dijkstra (Dijkstra) algorithm is a typical single-source shortest path algorithm that calculates the shortest path of a node to all other nodes. The main feature is to extend from the center of the starting point to the outer layer until it expands to the end point. Dijkstra algorithm is a very representative shortest p

KMP Algorithm and BM algorithm KMP is the classical algorithm of prefix matching and bm suffix matching, it can be seen that the difference between prefix matching and suffix matching is only the different order of comparison. Prefix matching is: the comparison of pattern strings and parent strings from left to right, the movement of pattern strings is also fro

First, briefMAC (message authentication code, messaging authentication Code algorithm) is a key hash function algorithm that is compatible with the features of the MD and SHA algorithms, and adds a key on this basis. So Mac algorithms are often called HMAC algorithms. The details of the HMAC algorithm can be found in RFC 2104 (Http://www.ietf.org/rfc/rfc2104.txt)

From http://www.cppblog.com/aurain/archive/2008/10/08/63480.html The euclidean algorithm, also known as the moving phase division, is used to calculate the maximum approximate number of two integers A and B. The computation principle depends on the following theorem:Theorem: gcd (a, B) = gcd (B, A mod B) The algorithm is described in C ++ as follows:Int gcd (int m, int N){If (M = 0)Return N;If (n = 0)Return

Algorithm 1 (Multi-border area, polygon direction, flood-fill, Floyd-warshall algorithm, short circuit problem 1) multi-layered AreaBytes The multidimensional representation of a pair (in reverse chronological order) is as follows: If the data is sorted by hour, you can obtain the hour number. For the multi-dimensional shapes described by the attention margin and the outer angle, the surface is as foll

PHP bubble algorithm and php bubble Algorithm I found that many companies have a bubble algorithm question during interviews. Generally, programmers can write this basic algorithm, but today I read it online, I found that the bubble Algorithm in many articles is wrong. It is

Soft test path-the algorithm is actually very simple, but the soft test algorithm is actually very simple Algorithms are recognized as the most difficult part of intermediate software designer exams. However, since the teacher gave us an algorithm, I feel that the algorithm is actually nothing. In the soft test, algori

Sort algorithms for algorithm learning: Hill sort, learning sort algorithm Hill Hill sortingAlso known as "downgrading incremental sorting", the basic idea is to divide the entire sequence of records to be sorted into several subsequences for direct insertion and sorting, respectively, when the record in the entire sequence is "basically ordered", the record is directly inserted and sorted. A characteristi

Original Intention: Recently readingAlgorithmWe can see that the greedy method solves the problem of MST. Unfortunately, the explanation on the tree is not very fresh, and it is not thorough to find a lot of information on the Internet. I just casually took the time to take a look at it, and I finally understood the basic idea. I 'd like to thank the powerful Google for helping me find a good English document. (There is a link below. If you are interested, you can check it out) Straighte

The classic algorithm part of the path of algorithm The author of this book, Heng Hengming, has another book, the string of data structures, and the philosophical principles of the operating system, are very good books. This book can be regarded as easy to read, writing is very good. The author joins a lot of his own thinking This article contains the classic

Finding and sorting algorithms are the introductory knowledge of algorithms, and their classical ideas can be used in many algorithms. Because of its short implementation code, the application is more common. So in the interview often ask the sorting algorithm and its related problems. But same, as long as familiar with the thought, flexible use is not difficult. Generally in the interview is the most frequent test is a quick sort and merge sort, and

The topic of introduction to MIT algorithm under this column (algorithms) is an individual's learning experience and notes on the introduction to the MIT algorithm of NetEase Open course. All the content comes from the lectures of Charles E. Leiserson and Erik Demaine teachers in MIT Open Course Introduction to algorithms. (http://v.163.com/special/opencourse/algorithms.html)Section I-------Course introduct

Author: July February 13, 2011.Reference code: introduction to algorithms, Second Edition.--------------------------------------- To learn what Dijkstra algorithm is, see: html "> http://www.bkjia.com/kf/201104/87374.html This article begins with the single-source shortest path problem, and then describes the Bellman-Ford algorithm,Describe every step of the Dijkstra Al