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1, Title Requirements A robot is located in the upper left corner of an m x n grid (the starting point is marked as "Start" in the figure below). The robot can only move down or right one step at a time. The robot tries to reach the lower right corner of the grid (marked as "Finish" in the figure below). How many different ...

Chapter II basic knowledge required for interview 1. Array Sword finger Offer 03 Duplicate number in array Find duplicate numbers in the array. All numbers in an array num of length n are in the range of 0 ~ n-1. Some numbers in the array are repeated, but I don't know how many numbers are repeated, or how many times each number is repeated. ...

preface I believe many students were asked about HashMap during the interview, especially Java/Android programmers. HashMap is almost bound to be mentioned. Because there are too many points to dig. HashMap about Java can be seen everywhere on the Internet. Naturally, with the popularity of fluent, you may also be asked about the HashMap of fl ...

1. Three basic sorts 1.1 bubble sorting #include <iostream> using namespace std; int main() { int arr[]={2,1,4,21,4,24,9,18}; int len = sizeof(arr)/sizeof(arr[0]); for(int i = 0;i < len; ++i) { for(int j = i+1;j<len;++j) { if(arr[i]<arr[j]) { arr[i]= arr[i]^arr[j]; arr[j]= arr[i]^arr[j]; arr[i]= ar ...

Data structure - tree structure First of all, what is a tree structure? In short, the tree structure is the structure you think now. The data structure like a tree is a tree structure. Typical tree structure examples: Windows operating system, Unix operating system and file system are all applications of tree structure. Basic concepts of tre ...

1. Stack Stack, a place for storing goods or accommodating passengers, can be extended to warehouse and transfer station. Therefore, when introduced into the field of computer, it refers to the place where data is temporarily stored. Therefore, there is the saying of entering and leaving the stack. It can be compared to eating, and sp ...

AVL tree introduction and detailed explanation of each operation Introduction to AVL treeImplementation of AVL tree operation set rotate RR insertion (left single rotation)LL insertion (right single rotation)RL insertion (right left double rotation)LR insertion (left and right double rotation) insertdeleteergodic Complete code Code ...

The author is a recent intern. The following code is the biggest optimization of current understanding ability. I hope it will be helpful to you; Compared with quick sort and heap sort, the author gives priority to recommend readers to use heap sort, because the code complexity of heap sort is fixed, and the more the number to be sorted, the mo ...

Congratulations on seeing this solution. It will help you avoid many pitfalls Of course, I don't want the big guy to be like the big guy in the following question. [AHOI2017/HNOI2017] big man - Luoguhttps://www.luogu.com.cn/problem/P37241336: [example 3-1] find tree roots and children Time limit: 1000 ms memory limit: 65536 KB Number of subm ...

1, Overview of arrays 1. Understanding of arrays: An array is a collection of several data of the same type arranged in a certain order, named with a name, and managed uniformly by numbering. 2. Array related concepts: Array name element subscript, subscript and index length of array: number of elements 3. Characteristics of array: Arrays ...