What is the use of merge sort?
Merge sort is an effective sorting algorithm based on the merge operation. It can be used to sort the overall disorder but the sub-items are relatively ordered, and to find the reverse logarithm. The specific idea is: During the merging process, the reverse logarithm of each small interval is calculated, and then the reverse logarithm of the large interval is calculated.
Merge sort (MERGE-SORT) is an effective sorting algorithm based on merge operations. The algorithm uses the divide and conquer method (Divide and Conquer). ) is a very typical application. Merge the already ordered subsequences to obtain a completely ordered sequence; that is, first make each subsequence orderly, and then make the subsequence segments orderly. If two ordered lists are merged into one ordered list, it is called a two-way merge. Merge sort is a stable sorting method.
Purpose
Sort
(The speed is second only to quick sort, it is a stable sorting algorithm, generally used For a sequence that is generally disordered but each sub-item is relatively ordered, please refer to the standard procedure of Question 3 of the 2011 Popular Semi-finals "Swiss Round")
Find the reverse logarithm
The specific idea is to calculate the reverse logarithm of each small interval during the merging process, and then calculate the reverse logarithm of the large interval (it can also be solved using a tree array)
The above is the detailed content of What is the use of merge sort?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1359
52
C/C++ program written using the merge sort algorithm to calculate reverse numbers in an array
Aug 25, 2023 pm 07:33 PM
The inverted representation of an array; how many changes are required to convert the array into its sorted form. When the array is already sorted, 0 reversals are required, while in other cases, if the array is reversed, the maximum number of reversals will be reached. In order to solve this problem, we will follow the merge sort method to reduce the time complexity and use the divide and conquer algorithm. Input Asequenceofnumbers.(1,5,6,4,20). Output the number of reversals required to sort the numbers in ascending order. Herethenumberofinversionsare2.Firstinversion:(1,5,4,6,20)Secondinversion:(1,4,5,6,20)algorithm merge
How to implement merge sorting in php
Oct 21, 2022 am 09:30 AM
How to implement merge sorting in PHP: 1. Create a PHP sample file; 2. Define the "public function handle(){...}" method; 3. Use "private function mergeSort($a, $lo, $hi)" {...}" method to gradually decompose the data; 4. Use the "merge" method to sort the decomposed data and then merge them together.
Detailed explanation of merge sort algorithm in PHP
Jul 08, 2023 pm 05:03 PM
Detailed explanation of the merge sort algorithm in PHP Introduction: Sorting is one of the common basic problems in computer science. The orderly arrangement of data can improve the efficiency of retrieval, search and modification operations. Among sorting algorithms, merge sort is a highly efficient and stable algorithm. This article will introduce the merge sort algorithm in PHP in detail, with code examples. Principle of Merge Sort Merge sort is a divide-and-conquer algorithm that divides the array to be sorted into two sub-arrays, merges and sorts the two sub-arrays respectively, and then merges the sorted sub-arrays into one
How to implement the merge sort algorithm in C#
Sep 19, 2023 am 09:45 AM
How to implement the merge sort algorithm in C# Merge sort is a classic sorting algorithm based on the divide-and-conquer idea. It completes sorting by dividing a large problem into multiple small problems, then gradually solving the small problems and merging the results. The following will introduce how to implement the merge sort algorithm in C# and provide specific code examples. The basic idea of merge sort is to split the sequence to be sorted into multiple subsequences, sort them separately, and then merge the sorted subsequences into an ordered sequence. The key to this algorithm is to implement the splitting and merging operations of subsequences.
How to implement merge sort algorithm using java
Sep 19, 2023 am 11:33 AM
How to use Java to implement the merge sort algorithm Introduction: Merge sort is a classic sorting algorithm based on the divide and conquer method. The idea is to divide the array to be sorted into smaller sub-arrays layer by layer, and then merge the sub-arrays in sequence through the merge operation. Merge into a sorted overall array. In this article, we will introduce in detail how to implement the merge sort algorithm using Java and provide specific code examples. Algorithm steps: The merge sort algorithm mainly includes three steps: splitting, merging and sorting. Split: First, we need
How to use divide and conquer method to implement merge sort algorithm in PHP and improve sorting efficiency?
Sep 19, 2023 pm 02:10 PM
How to use divide and conquer method to implement merge sort algorithm in PHP and improve sorting efficiency? Merge sort is an efficient sorting algorithm. It uses the idea of divide and conquer method to divide the array to be sorted into two parts, sort the two sub-arrays respectively, and then merge the two sorted sub-arrays into one. ordered array. Merge sort can stably turn an unsorted array into an ordered array by continuously breaking the problem into smaller sub-problems and combining the solutions to the sub-problems. In PHP, implement the merge sort algorithm and improve sorting efficiency
Merge Sort Algorithm in Java: Principles and Practical Applications
Feb 18, 2024 pm 03:17 PM
Detailed explanation of the merge sort algorithm and its application in Java 1. Introduction Merge sort is a classic sorting algorithm. It uses the idea of divide and conquer to divide the array into two sub-arrays, then recursively sort the sub-arrays, and finally combine the two Sorted subarrays are combined into one sorted array. This article will analyze the merge sort algorithm and its applications in Java in detail, and give specific code examples. 2. Algorithm Principle The main idea of merge sort is to divide a large array into two sub-arrays, sort the two sub-arrays respectively, and finally combine the two ordered
Find the permutation that leads to the worst case scenario of merge sort in C
Aug 28, 2023 pm 04:09 PM
Concept: For a given set of elements, determine which arrangement would lead to the worst case scenario of merge sort? We know that asymptotically, merge sort always takes O(nlogn) time, but in practice, cases that require more comparisons usually take more time. Now we basically need to determine an arrangement of input elements that maximizes the number of comparisons when implementing a typical merge sort algorithm. Example Consider the following set of elements as the sorted array 11121314151617181920212223242526 The worst case input array that results in merge sort is 11191523132117251220162414221826 Method We study how to