Programmer Think

One of the data structures commonly used in HashMap work. The underlying data structure is composed of array + linked list + red black tree, as shown in the figure below After knowing the data structure of HashMap, you will have some doubts. Why are there some linked lists, some red and black trees, and some have only one node? How do the link ...

introduction Recently, I am learning the data structure of javaScript. Linked list and array in javaScript can play a complementary relationship. Some complex data structures are suitable for array implementation (such as stack), while others are more suitable for linked list implementation (such as queue). Today, I will study the implemen ...

Title Description In 1944, special forces Mike received an order from the Ministry of defense to rush to an isolated island in the Pacific Ocean to rescue Private Ryan captured by the enemy. Ryan was imprisoned in a maze with complex terrain, but fortunately Mike got the topographic map of the maze. The shape of the maze is a rectangle. Its nor ...

1, Perfect binary tree It is also called full binary tree, that is, except for the leaf node of the last level, each node has two child nodes 2, Complete binary tree Two conditions need to be met: (1) Except for the last layer, the number of nodes in other layers reaches the maximum (2) The nodes of the last layer are concentrated on the lef ...

To illustrate the environment, the code is implemented in C + +, but the matrix operation is not implemented in C + +. Making wheels by yourself is a waste of time and unnecessary. Therefore, the Eigen library is used for matrix operation, and the codes of other functions are implemented by yourself. 1, Environment configuration The Eigen mat ...

Leetcode problem solving - Mathematics 204. Count prime Count the number of all prime numbers less than non negative integer n. (the definition of prime is very simple. If a number can only be divided by 1 and itself, then the number is prime.) Input: n = 10 Output: 4 Explanation: there are four prime numbers less than 10, They are two, 3, ...

236. Nearest common ancestor of binary tree Title Description: Train of thought analysis: Anyway, I'm still confused about recursion... More practice can only be. The thought of boss Carl can still be understood. It's really unexpected when he did it himself. The code is as follows: /** * Definition for a binary tree node. * public class ...

Introduction to Zset Redis ordered collection, like Set collection, is also a collection of string elements, and duplicate members are not allowed. The difference is that each element is associated with a score of type double. redis sorts the members of the collection from small to large through scores. Members of an ordered set are unique ...

Sequence table Understand several key points C language is process oriented programming, so the object in C refers to the physical memory that stores (multiple) values. An object may not store the actual value, but it has the corresponding size when stored C + + object-oriented programming, so object in C + + refers to class object, whic ...

9. Analysis overview of linked list related topics Link to mind map Algorithm and data structure mind map Refer to the course notes of Zuo Cheng cloud system algorithm Refer to Moke network algorithm system course notes Summary of common questions: 1. Find the middle node of the linked list Meaning: It is designed to find the sp ...