Recursive Divide--Example 4. Quick sorting

Recursive Dividing - Example 4. Quick Sorting 1. Description of the problem Given an array, use the quick sort algorithm to sort. 2. Solving problems Familiar QuickRow, written several times before. RandomizedQuickSort, an algorithm for random pivot selection, is also extended here. The idea of Quick Row is simple: For input a[p:r], sort ...

Posted on Tue, 30 Nov 2021 14:11:50 -0500 by harley1387

Algorithm analysis and design "two" recursive algorithm

1, Recursive thought Recursion is the most commonly used method in algorithm design. It usually makes the description and solution of a large and complex problem concise and clear. What is recursion? In short, a function call itself is recursive. If you want n! Recursive implementation function of: int Factorial(int n) { if (n == 0) ...

Posted on Sun, 28 Nov 2021 15:33:54 -0500 by ferrit91

LeetCode_String_394. String Decode String [String, Recursive] [java] [Medium]

Catalog 1. Title Description English Description Chinese Description Examples and instructions 2. Solving problems Three, AC code Java 4. Problem solving process First Bo Second Stroke   1. Title Description English Description Given an encoded string, return its decoded string. The encoding rule is: k[encoded_string], where ...

Posted on Sat, 27 Nov 2021 13:55:22 -0500 by DragonFire-N[R]

Internet classic algorithm interview question - Verifying binary search tree

preface Hello, I'm brother Xiong. Today, I bring you a high-frequency interview question related to binary tree. This question has been used as an interview question by big companies such as Google, byte, Microsoft and Amazon in half a year, that is, the 98th question on force buckle - Verifying binary search tree. This paper mainly introduce ...

Posted on Wed, 24 Nov 2021 14:29:24 -0500 by CFennell

Little knowledge of C language --- the use of recursive functions

  C language allows functions to call themselves, which is called recursion. When many people first learn recursion, they are often confused by layers of nested calls. They don't know how to call them? Now let's use a small example to demonstrate how the function works when it is called recursively. void up_and_down(int n) { printf("---- ...

Posted on Fri, 01 Oct 2021 17:56:50 -0400 by jaku78

Four traversal methods of tree (recursive and non recursive implementation c++&java)

Traversal of tree: 1. Preorder traversal 2. Middle order traversal 3. Post order traversal 4. Sequence traversal 1. Preorder traversal         Preorder traversal, that is, DLR, first accesses the root node, then the left subtree, and then the right subtree. Therefore, traversal and backtracking are required Recursio ...

Posted on Wed, 22 Sep 2021 08:08:58 -0400 by pelleas