Tag: leetcode

The code of life

LeetCode Advanced 226- Flipping binary Trees (Huawei interview questions)

January 26, 2024

by Mary Smith-McCormick

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Change the position of the two children in the binary tree, that is, left to right, right to left. You can't use recursion. 237. Invert...

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The front end

94. Middle order traversal of binary trees

January 26, 2024

by Mehul Shan

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Given a root node of a binary tree, return its middle-order traversal. Example 1: Example 2: Example 3: Example 4: Example

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The back-end

Now we know the difference between the two templates! Find the first and last position of an element in a sorted array (LeetCode 34)

January 26, 2024

by Alex Hall

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Today is the 16th issue, strive for a daily issue, at most two days, welcome everyone to supervise me... Don't worry, let's look at today's...

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reading

Construct the Rectangle. Construct the Rectangle

January 26, 2024

by Ashley Lopez

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Construct the Rectangle given the area of the Rectangle, find the side length with the least difference between the width and height. Because we're trying...

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reading

The stack is used to implement a queue | punch brush

January 26, 2024

by Steven Tate

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You can implement a first-in, first-out queue using only two stacks. Queues should support all the operations that queues normally support (push, POP, peek, empty)...

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reading

181. Employees Earning More Than Their Managers

January 25, 2024

by Amy Smith

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D112 181. Employees Earning More Than Their Managers 181. Returns the name of the employee whose salary is higher than the superior's. I'm thinking of...

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The front end

[Luffy]_ Brush leetcode 202 together. Happy number

January 25, 2024

by Leslie Robertson

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This is the first day of my participation in the Gwen Challenge in November. For details, see: The last Gwen Challenge in 2021. Write an...

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The back-end

Implementing queues with stacks < difficulty factor ⭐>

January 25, 2024

by Robert Williams

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"This is the 10th day of my participation in the November Text Challenge, for details: the last Text Challenge 2021" 📝 Description: Please use only...

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The front end

Force button: 10 regular expression matching

January 25, 2024

by 李懿

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This is the 20th day of my participation in the Last Gwen Challenge in 2021. Regular expression matching problem description gives you a string S...

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The back-end

Circular Permutation in Binary Representation (Python)

January 25, 2024

by Miss Chloe Perry

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Circular Permutation in Binary Representation (Python) The first method uses bit operations to solve the problem, and the second method writes the code imitating the...

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The code of life

Leetcode_397 integer replacement

January 25, 2024

by Janice Buckley

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Given a positive integer n, you can do the following: if n is even, replace n with n / 2. If n is odd, you...

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The code of life

9. Implement queues with two stacks

January 25, 2024

by Vanessa Johnson

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Describes implementing a queue using two stacks to perform Push and Pop operations on the queue. The in stack handles push operations and the out...

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The front end

[Luffy]_ programmers must brush force deduction: use the minimum cost of climbing stairs

January 25, 2024

by Casey Bowater-Parkes

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Each subscript of the minimum cost stair climbing force link array is used as a ladder. The ith ladder corresponds to a non-negative cost cost[I]...

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The code of life

LeetCode Advanced 4- Divide and conquer

January 25, 2024

by Michael Hester

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In computer science, divide-and-conquer is an important algorithm paradigm based on multinomial branch recursion. The literal interpretation is "divide and conquer", which is to divide...

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The back-end

Leetcode 101. Symmetric Tree (Python)

January 25, 2024

by 楊冠霖

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Leetcode 101. Symmetric Tree (Python) uses recursive functions to simulate the Symmetric solution of the center line

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The back-end

Horse-drawn cart algorithm to solve the longest loop substring! Manacher

January 25, 2024

by Stephen Little

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LeetCode: the longest loop substring, the best solution: the horse-drawn cart algorithm solution, for the interview, looking forward to your participation.

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The front end

20. Valid parentheses, for loop replace, JavaScript, detailed comments

January 25, 2024

by 金淑貞

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The number of pairs of parentheses is exactly 1/2 the length of the string, assuming n pairs of parentheses. Loop n times, each time replacing...

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The code of life

Leetcode_300 longest increasing subsequence

January 25, 2024

by Purab Datta

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Given an integer array nums, find the length of the longest strictly increasing subsequence. A subsequence is a sequence derived from an array that deletes...

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The code of life

The KTH smallest element in the leetcode_378 ordered matrix

January 25, 2024

by Amira Lad

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You are given an n x n matrix matrix, where each row and column elements are sorted in ascending order, and find the KTH smallest...

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The front end

LeetCode brush questions record group 2 (after the previous chapter)

January 25, 2024

by Gillian Patterson

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Reverse integer division to find the shortest string containing all characters of the sum of three different numbers. Determine if the parenthesis string is valid....

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reading

Encounter algorithm hard problem someone kneel three times, someone a set of templates to solve three problems!

January 25, 2024

by Miss Chloe Perry

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One of my friends gave me a feedback, because I didn't do the algorithm hard question well, HR reported that the interviewer gave a "bad...

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The back-end

Unpacking and packing

January 25, 2024

by 王志偉

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The idea here is simple, but when it comes to the problem, it's hard to use. 241. Design priority for an operation expression Given a...

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The back-end

Bit operations for optimal efficiency

January 25, 2024

by Donna Holmes

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Basic bit operations include and or as well as xOR, left shift, and unsigned right shift. Keeping these common techniques in mind can be helpful...

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The code of life

Leetcode_390 Elimination game

January 25, 2024

by Kartik Grewal

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Ask for a list of integers sorted from 1 to n. First, from left to right, starting with the first number, delete every other number...

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The code of life

LeetCode advanced 944- Algorithm optimization

January 25, 2024

by 徐建宏

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Through question 944, this paper demonstrates the correct way to solve the problem in the actual learning process, as well as the learning method. Algorithm-related...

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The back-end

20. Valid brackets

January 25, 2024

by Hazel Thakur

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20. Effective brackets given a include only '(',') ', '{','} ', '/', ' 'string, to determine whether a string is effective. An open parenthesis must...

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The front end

LeetCode journey for Front-end Engineers — Binary Tree Medium (DFS and BFS)

January 25, 2024

by Roger Patel

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Application of DFS (depth first Search) and BFS (breadth first search) in binary tree traversal.

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The back-end

Looking for repeat count | punch brush

January 25, 2024

by 方淑慧

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Given an array nums containing n + 1 integers, all of which are between 1 and n (including 1 and n), we know that there...

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The back-end

24. Swap nodes in a linked list in pairs

January 25, 2024

by Miss Natalie Tucker

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Given a linked list, swap adjacent nodes in pairs and return the swapped list. You can't just change the values inside a node, you need...

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The front end

[Luffy]_leetcode-3- The oldest string without repeating characters

January 25, 2024

by Samantha Edwards

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Given a string s, find the length of the longest string that does not contain repeated characters. Example 1: Example 2: Example 3:

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