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1, Traversal of binary tree Access each node in the tree according to a search path, so that each node is accessed. It is mainly divided into first order traversal, middle order traversal, second order traversal and sequence traversal 2, Preorder traversal 2.1 manual calculation The exam usually gives the shape of a tree and writes its preo ...

Welcome back to: meet blue bridge, meet you, not negative code, not negative Qing!   catalogue 1, What are two pointers 2, Chestnut introduction 3, Force buckle classic Chestnut 1: reverse string Chestnut II: lifeboat Chestnut 3: the middle node of the linked list Chestnut IV: circular linked list Chestnut five: circular li ...

1. Title Description Enter an integer array. One or more consecutive integers in the array form a sub array. Find the maximum value of the sum of all subarrays. The required time complexity is O(n). Example 1: Input: num = [- 2,1, - 3,4, - 1,2,1, - 5,4] Output: 6 Explanation: the maximum sum of continuous subarray [4, - 1,2,1] is 6. ...

1, Integer First of all, use the simplest example provided inside to sort the shaping package main import ( "fmt" "sort" ) func main() { a := sort.IntSlice{2, 8, 3, 7, 9, 4, 1, 6} fmt.Println("Before sorting", a) sort.Sort(a) fmt.Println("After sorting", a) } You'd better wonder what sort.IntSlice is. Click to view the source ...

1, Request This paper expounds the process from submission to execution of multiple jobs, and explains the concept, differences and relationship of three-level scheduling;The ideas, characteristics, advantages and disadvantages of FCFS, SJF/SPF, HRRN, RR and multi-level feedback queue scheduling algorithms are described;The algorithm realize ...

JavaScript data structure and algorithm (XIII) binary search tree Binary search tree Binary Search Tree (BST), also known as binary sort tree and Binary Search Tree. Binary search tree is a binary tree and can be empty. If it is not empty, the following properties are met: Condition 1: all key values of non empty left subtree are less than ...

Today is lzgg a question, a special session for Xiao Hong; The topic is not very difficult, but the website always collapses during the competition, so the experience is not very comfortable; A. Xiao Hong's sign in question Title: Portal Question meaning: a question, a total of b people participated, and the total number of questions passed ...

Problem A - Find the 3-bit even number meaning of the title Any three numbers in the array are spliced into three digits. Non even numbers and no leading 0 are required. All qualified numbers are returned in ascending order thinking See that the range of the given array is 100, and directly triple loop. Since the requirement is not repeated, i ...

Fast number theory transformation (NTT) I wanted to learn this thing before. I haven't done it orz. Now I'll make it up. I don't think I have much new knowledge about learning this thing. It's good to master FFT before learning. FFT can be seen here: https://www.cnblogs.com/Tenshi/p/15434004.html NTT is used to solve the modular problem of po ...

This article is mainly a summary based on oiwiki, and will do a series of related articles in the future. If you want to continue reading, you can follow the column. The purpose of this column is to lay a foundation for my recent systematic. So I want to write a column for beginners who like ACM. Why read in and output optimization In f ...