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🎆 Understand sequential stack and chain stack In the world of data structure, stack, like sequential list and linked list (linked storage structure), is a linear storage structure. Stack is a linear table (logical structure concept) with limited operation. The particularity of its operation lies in its "last in, first out" chara ...

Algorithm divide and conquer 1 algorithm idea A problem with scale n is divided into k smaller subproblems, which are independent and the same as the original problem. Then these subproblems are solved recursively, and the solutions of the subproblems are combined to obtain the solution of the original problem. \[T(n)=\begin{cases}O(1) & n= ...

1, Closure 1.1 introduction to closures We have learned about the function before. We know that when the function is called, the variables defined in the function are destroyed, but sometimes we need to save the variable in the function and complete some column operations based on the variable every time. For example, what should we do every ...

1. Pre order printing node [problem description] the algorithm is designed to print the leaf nodes of the binary tree in the way of preorder traversal. [input form] a line of string, which is the preorder traversal sequence of the extended binary tree, which is used to construct the binary tree. [output form] the pre order leaf traversal s ...

preface In the process of learning data structures or algorithms, we inevitably need to use sorting. The so-called sorting is to arrange the records in a certain order. The data structure mainly introduces eight common sorts. Let's learn together this time. Tip: the following is the main content of this article. The following explana ...

Hello, I'm Monday. We talked last time Heap and heap sorting This time, let's talk about heap related topics. 1, Almost ordered array sorting 1. Title Description: An almost ordered array is known, which means that if the array is arranged in order, the distance of each element must not exceed K, and K is relatively small relative to th ...

Spring boot associated druid First of all, why do we use this database connection pool? A large part of our development is around the database. When we operate on the database, we need to go in and out of the database connection pool to obtain the connection with the database. Therefore, an efficient and safe database connection pool has becom ...

1, Overview of classes and interfaces Advantages and functions of Java collection framework Using a mature collection framework helps us write efficient and stable code conveniently and quicklyLearning the data structure knowledge behind it will help us understand the advantages, disadvantages and usage scenarios of each collection ...

📢 Blog home page: 🏀 Bryant typing the code🏀 📢 Welcome to praise 👍 Collection ⭐ Leaving a message. 📝 Welcome to discuss! 👏 📢 This article was originally written by [Bryant who knocked the code], and was first launched in CSDN 🙉🙉🙉 📢 Since the blogger is learning Xiaobai, there will inevitably be mistakes. If you have any questions, ...

1, Foreword   in the past, the sorting methods we studied were based on comparison, and their efficiency was either quadratic or logarithmic. Bucket sorting is based on container sorting, which is mainly divided into count sorting and cardinality sorting. This paper describes the knowledge of cardinality sorting.   the idea of ...