Programmer Think

Previous review Custom precon H header file. Function: it is contained in the core header file, so as to call the relevant defined dataDefine Boolean and Status return value types, which are essentially int typesSqList and ElemType are two structures defined. In fact, they belong to independent structures Struct nestingDefine and initialize ...

Introduction: Using the area of the ring to calculate the radius of the circle in reverse, a more stable radius of the circle can be obtained. For the movement of the standard template on the scanner, you can see the change law of the corresponding measurement results. The following is a preliminary analysis of such changes. Key words: bac ...

Title Description Cities are represented by a two-way connected graph, in which there are n nodes, numbered from 1 to n (including 1 and N). The edges in the figure are represented by a two-dimensional integer array edges, where each e d g ...

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 ...

1. Particles stay SLAM GMapping (4) SLAM processor Each particle updated by particle filter independently records a possible robot trajectory and environment map In order to improve efficiency, GMapping designs a data structure of trajectory tree The trajectory of the robot can be obtained by tracing from the leaf node to the root node ...

Summary of leetcode dynamic programming 1 1-longest palindrome substring Title Link: Title Link stamp here!!! The test passed several times. The AC code is as follows. The first use of violence enumeration, double pointer to judge palindromes, timeout. The second time, I thought it was OK to flip the string and compare it with the original st ...

A string or says it's a math problem 1. Violence Ah, at first glance, we will think that if we find out the full arrangement of strings and then sort to select the smallest, but this is O(n!) Time complexity, I'm afraid this has to explode 2. Mathematical proof + sorting First of all, both the book and the solution give a definition, ...

Number of occurrences of 1 in jz31 integers (from 1 to the number of occurrences of 1 in n integers) describe Enter an integer n and find the number of occurrences of 1 in the decimal representation of N integers 1 ~ n For example, the numbers 1, 10, 11, 12 and 13 containing 1 in 1 ~ 13 appear 6 times in total thinking Direct method: splice ...

//Updated on January 22, 2022 The updated content is mainly the introduction classic of algorithm competition - Training Guide (upgraded version) (edited by Liu Rujia and Chen Feng), Chapter 4 geometric problems 1 basis of 2D geometry In the plane coordinate system, vectors, like points, are also represented by two numbers x and y. Chapter 6 ...