Programmer Think

1, Title Requirements An arrangement of an integer array is to arrange all its members in sequence or linear order.For example, arr = [1,2,3], the following can be regarded as the arrangement of arr: [1,2,3], [1,3,2], [3,1,2], [2,3,1].The next permutation of an array of integers refers to the next lexicographically ordered permutation of its i ...

I was brushing the water question, but I suddenly found this question. It happened to be what we learned yesterday, so we came to consolidate it. Give it to us n n n points, m m m edge ...

True question link: Click here Completion Question A: doorplate making (5 points) Problem Description: Brief description of ideas: Solution 1: The while loop decomposes the number on each bit code: public static void main(String[] args) { int ans=0; for(int i=1;i<=2020;++i){ int a=i; while(a!=0){ if(a%10==2)ans ...

Dynamic point divide and conquer, with repair. Obviously, if the simple use of point divide and conquer will timeout, then we just need to consider inheritance, and there seems to be nothing else. Analyzing the whole process, we need to re count the overall situation if we only change one point. Obviously, it's not good. Then the modified point ...

Constructing binary tree from pre / mid / post traversal sequence Basics First of all, we need to know the specific order of the three depth first traversal binary trees: Preface: middle left and rightMiddle order: left middle rightPost order: left and right middle In addition, you should know that only middle order + pre / post order can u ...

Analysis of various applications of pointer and real interview questions of large factories preface Most of the pointers learned by beginners or ordinary colleges and universities are simple, that is, we understand that the pointer is an address. We can operate the address content through dereference operation, which is often limited ...

Data structure (I) school online link. Under data structure (school online). Station B link. Method steps: 1. Watch the video of station B, type the code and take notes. Online segmentation according to school 2. Compare whether the online video of the school is missing. 3. Do school online exercises and supplement notes. Chapter - Intro ...

preface This article uses three examples to explain the single adjustment stack What is a monotone stack The elements in the stack are strictly or non strictly monotonically increasing or decreasing When implementing, maintain the order of elements in the stack Example 1 Acwing1978 (simple) Title Link https://www.acwing.com/problem/content ...

Hash concept Premise: In order structure and balance tree, there is no corresponding relationship between element key and its storage location. Therefore, when looking for an element, it must be compared many times by key. The time complexity of sequential search is O(N), and the height of the tree in the balance tree is O (log n). The ef ...

Use Rust to complete one-way linked list I've been idle recently. I saw the rise of rust, a language with a considerable salary. I heard that some linux began to write with rust, but I heard that learning had a curve. At that time, I didn't believe in evil. After learning, I knew that there was a curve... The linked list alone has been done fo ...