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Basic part of tree structure 1, Binary tree 1. Why do you need a tree data structure 1.1 analysis of array storage mode Advantages: it is fast to access elements by subscript. For ordered arrays, binary search can also be used to improve the retrieval speed. Disadvantages: if a specific value is to be retrieved, or the inserted value (in a ...

Title Link: Array Stabilization (GCD version) General meaning Given an array of length n, the subscripts are from 1 to n. where an and a1 are connected (form a ring) Each round of operation yields a new array b: for all I ∈ [1, n], b[i] = gcd(a[i], a[i + 1]) (b[n] = gcd(a[n], a[1]) Finally, copy the new array b to the original array a ...

heap Priority queue A special "queue" in which elements are taken out according to the priority (keyword) size of elements rather than the order in which elements enter the queue. Implementation method: (1) Arrays: inserting (elements are always inserted at the end) Delete (find the largest or smallest keyword and delete the ele ...

There are four code snippets The first is the most basic method. Because the efficiency of the method is too poor, it is tested with 10W first. The final optimized program will run all prime numbers within 100W. Because the program has different thinking and computing power, there will be an episode in the middle, which will be explained in th ...

summary When it comes to the three letters of JVM, what first pops out of your mind? I generally analyze the following three kinds of people: The first one: I know the three letters of JVM separately. I don't know what it isSecond: isn't it a Java virtual machine that runs Java programsThe third kind: it is divided into heap memory, method ...

HashMap is the most commonly used key value collection in java. It is necessary to understand its principle and underlying code. Today, record the of HashMap Research and analysis of put() method (element addition method); First, let's talk about the results of personal research and analysis: During instance initialization, HashMap does ...

Bubble sorting Bubble sorting is a process of comparison There are two layers of loops. The outer layer actually controls the number of times. Each cycle will have a maximum value exchanged to the tail Then you don't need to bring it on the next cycle Each inner layer cycle will be compared from the beginning to the end Only the latter of t ...

Data structure and algorithm (1) array structure I Basic use of arrays Create and initialize arrays It is easy to declare, create, and initialize arrays in JavaScript, as follows: //Create and initialize arrays let daysOfWeek = new Array(); let daysOfWeek = new Array(7); let daysOfWeek = new Array('Sunday','Moday','Tuesday','Wednesday','Thu ...

1, Prefix tree Generally, when designing websites, there will be problem publishing or content publishing functions. A very important point of these functions is how to realize sensitive word filtering. Otherwise, there may be bad information publishing, or the published content may contain code fragments with malicious functions. The basic al ...

I Linked list 1. Linked list definition A linked list is a recursive data structure. It is either empty (null) or a reference to a node that contains a generic element and a reference to another linked list. In this definition, a node is an abstract entity that may contain any type of data type. Its applications to nodes show its usefulne ...