Programmer Think

2021-12-27 swipe questions and punch in every day Force buckle - sort 75. Color classification Given an array of n elements including red, white and blue, sort them in place so that the elements of the same color are adjacent and arranged in the order of red, white and blue. In this problem, we use integers 0, 1 and 2 to represent red, whit ...

The core idea of quick sort algorithm is to put the elements smaller than the benchmark to the left of the benchmark and the elements larger than the benchmark to the right of the benchmark. After a round of sorting, divide the data to be sorted into two independent parts. All the data in one part is smaller than all the data in the other part, ...

catalogue 1, Foreword 2, Title Description ① Students who want to practice English can read this question carefully to see if they can understand the question. What do you want us to do! ② The following is the input and output of the sample (read the question carefully! There is an implication) ​ 3, Topic interpretation 4, Train of thoug ...

preface Linked list, like array, is a linear data structure. The linked list operation in the algorithm is generally aimed at one-way linked list, because one-way linked list is relatively simple, but it can better the thinking ability of postgraduate entrance examination programmers. Although the one-way linked list is relatively simple, it i ...

Taking the example of issue 16 as an example, we select Matlab and Excel to explain how to realize the general simplex method, large M method and two-stage method. The topics are as follows: 1, Matlab solution As one of the most popular scientific computing software, MATLAB is widely used in data analysis, wireless communication, deep lea ...

Solution to the 273rd weekly game of Leetcode (C + + version) Problem A - Number reversed twice meaning of the title Ask whether a number reversed twice is equal to the original number thinking Only the last 0 matches the number 0 code class Solution { public: bool isSameAfterReversals(int num) { return (num%10||num==0); } }; ...

Group a analysis of the 6th Blue Bridge Cup (2015) 1 - bear monster eats walnutsThere is a bear monster in the forest. He likes walnuts very much, but he has the habit of dividing the walnuts he finds into two equal parts each timeEat one and keep one. If it can't be divided equally, the bear monster will throw away a walnut and divide it agai ...

Always curious, how does the operating system work? We know how normal programming makes the code run, but those are high-level things. Later on, you will feel like a castle in the air, or someone has paved a lot of truth for you, but you know nothing about it.   1. Confusion of operating system Of course, I don't really know anything. Because ...

116. Populate the next right node pointer for each node Meaning: Given a perfect binary tree, all leaf nodes are in the same layer, and each parent node has two child nodes. Binary tree is defined as follows: struct Node { int val; Node *left; Node *right; Node *next; } Fill in each of its next pointers so that this pointer po ...

Title address: https://leetcode.com/problems/couples-holding-hands/ There is a given length 2 n 2n 2n array A A A. Number by 0 ...