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1, The concept of binary search tree Binary search tree is also called binary sort tree. It is either an empty tree or a binary tree with the following properties: 1. If its left subtree is not empty, the values of all nodes on the left subtree are less than the values of the root node. 2. If its right subtree is not empty, the values of all no ...

Fibonacci Title Description: We all know the Fibonacci sequence. Now it is required to input a positive integer n. please output the nth item of the Fibonacci sequence. Problem solving ideas: 1. Recursion 2. Dynamic planning Status: F(n) State recurrence: F(n)=F(n-1)+F(n-2) Initial value: F(1)=F(2)=1 Return result: F(N) Code implem ...

Abstract: This article will explain the process of natural language processing in detail, the emotion classification algorithm based on machine learning and TFIDF, and compare various classification algorithms (SVM, RF, LR, Boosting) This article is shared from Huawei cloud community< [Python artificial intelligence] 23 Emotion classificatio ...

Due to the long length of this article, in order to facilitate everyone's reading and collection, this article has been specially transformed into a PDF document. click Download Java learning manual, pdf tutorial. 1. Collection overview Collections in Java are mainly divided into three categories: List: sequential and repeatable.Set: no sequ ...

0. Title Description Sword finger Offer II 001 Integer divisionTitle Description: divide integers and round the result (discard decimal places)Title Requirements: do not use *, /,%Constraint condition: [- 231 - 1]. If the division result overflows, 231 - 1 will be returned 1. Content description The following four solutions come from Easy ...

Rogue: Monkey A very disgusting question. The meaning of the question cards you first, making you feel that it gives the structure of a tree (one monkey with two hands) But in reverse, the monkey's hand is a directed edge, and there are double edges or self rings in the graph A monkey's hand is not holding the other monkey's hand (release ...

Chapter05 Array, sort, find Array initialization dynamic initialization int[] arrayDemo = new int[6]; double[] arrayDemo2; arrayDemo2 = new double[5]; initiate static int[] array = {1,2,3}; Attention to details: Array is a reference type, and array data is an objectThe index starts at 0 Array assignment mechanism By default, the ...

Sword finger Offer 07 Rebuild binary tree Enter the results of preorder traversal and inorder traversal of a binary tree, please build the binary tree and return its root node. It is assumed that the input pre order traversal and middle order traversal results do not contain duplicate numbers. This problem uses the idea of recursion. Use pre ...

      1, Depth first search (BFS) 1. Introduction   BFS, its full English name is bread first search. BFS does not use rule of thumb algorithms. From the point of view of the algorithm, all child nodes obtained by expanding nodes will be added to a first in first out queue. In general experiments, the nodes whose neighbor nodes hav ...

brief introduction Divide and conquer algorithm design idea Recursion and divide and conquer Design idea of recursive function: divide and rule (reduce and rule) Top down problem solving Why use stacks? This step was also understood when I looked at the sword finger offer. "Go out first" when splitting, and &quo ...