Tag: leetcode

The front end

1 of the day — Constructing binary trees by traversing pre-order and middle-order sequences

February 5, 2024

by Linda Newman

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This is the ninth day of my participation in the First Challenge 2022. For details: First Challenge 2022. Given a tree, preorder and inorder are...

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The back-end

68. Left-right text alignment: Large string simulation

February 5, 2024

by 胡惠雯

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Offer to come, dig friends take it! I am participating in the 2022 Spring Recruit Punch card activity. Click here for details. This is 68...

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The back-end

43. String multiplication

February 5, 2024

by Stephen Shepard

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Given two non-negative integers num1 and num2 represented as strings, return the product of num1 and num2, whose product is also represented as strings. You...

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The front end

Day 57: Decode xOR array

February 5, 2024

by Ruby Matthews-Hughes

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The unknown integer array ARR consists of n non-negative integers. Encoded to another integer array of length n-1, where encoded[I] = arr[I] XOR arr[I +...

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The back-end

Leetcode 58. Length of last word

February 5, 2024

by Martyn Henry

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Leetcode 58. Length of last word I am participating in the 2022 Spring Recruit Punch card activity. Click here for details. 1. 📑 gives you...

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The front end

A collection of Errors

February 5, 2024

by Angela Martinez

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The set S contains integers from 1 to n. Unfortunately, because of a data error, one number in the set copies the value of another...

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The back-end

22. The k last node in the linked list

February 5, 2024

by Tejas Chaudhry

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22. The k node from the last to the last in the list offers to drive, dig friends accept! I am participating in the 2022...

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The back-end

Problem 126 – Solitaire II

February 5, 2024

by Sahil Upadhyay

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Click the wordList from beginWord to endWord

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The front end

【 Li Kou Brush Topic 5】 — “The longest Antecedent String”

February 5, 2024

by Miss Anne Moore

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Offer to come, dig friends take it! I am participating in the 2022 Spring Recruit Punch card activity. Click here for details. Given a string...

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The back-end

A daily entry leetcode142- Find the linked list central

February 5, 2024

by Riley Cochran

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If it doesn't exist, insert the HashMap. If it does, the node is already inserted, so it's a duplicate node. Why is it repeated?

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The front end

【 data Structure 】– Tree and Binary Tree

February 5, 2024

by Jorge Coffey

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This is the third day of my participation in the Last Text Challenge in November 2021. The last text challenge in 2021 is to summarize...

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The back-end

Leetcode 316. Remove Duplicate Letters (Python)

February 5, 2024

by Brett Flynn

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This week's questions are all about the application of the stack. This question is slightly different, mainly about the specific application of the monotonous stack,...

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The front end

[Length of last Word] (Easy)

February 5, 2024

by Lisa Young

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Find the last word in the string and return the length of the word.

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The front end

Likou 👊 463. Circumference of the island

February 5, 2024

by 張宜君

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This is the 20th day of my participation in the First Challenge 2022. For details, see: The First Challenge 2022. The perimeter of the island...

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The back-end

LeetCode-155. Minimum Stack (Day35)

February 5, 2024

by Vanya Ramanathan

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Gold three silver four, again to brush the month. If you have time, I hope you still brush it as far as possible. Help is...

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The back-end

18. Remove nodes from the list

February 5, 2024

by Michael Hester

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18. Delete linked list node Offer I am participating in the 2022 Spring Recruit Punch card activity. Click here for details. 1. Given a head...

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The front end

The number of prime numbers in binary

February 5, 2024

by Anvi Garg

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Given two integers L and R, find the range of closed interval [L, R] and calculate the number of integers where the bit is prime....

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The code of life

LeetCode58. Length of last word

February 5, 2024

by Christopher Foster

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Flip the entire string and separate the first word with a double pointer. Note that the prefix whitespace is filtered out for the left pointer....

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The back-end

Leetcode 83. Remove duplicate elements from sorted linked lists

February 5, 2024

by Zachary Taylor

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Delete duplicate elements from the sorted list. I am participating in the 2022 Spring Recruit Punch card activity. Click here for details. 1, 📑 given...

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The back-end

Leetcode 946. Validate Stack Sequences (Python)

February 5, 2024

by Maia Stone

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The basic concept of the stack is still investigated, but the difficulty of the question is to give the operation process of the stack and...

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The front end

Force buckle 0207-1405. Longest happy string

February 5, 2024

by Aarav Chaudhuri

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"This is the 14th day of my participation in the First Challenge 2022. For details: First Challenge 2022." A string is a happy character if...

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The back-end

18 — Enter a number and print a right triangle.

February 5, 2024

by Kevin Arroyo

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Offer to come, dig friends take it! I am participating in the 2022 Spring Recruit series activities - click on the task to see the...

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The back-end

415. String addition

February 5, 2024

by Dennis Gray

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The input string is not allowed to be converted to an integer directly, so it is natural to press the string to char one per...

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The front end

LeetCode — Binary summation (string summation)

February 5, 2024

by Wendy Haynes

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The sum of a string can be calculated from the last character of the string. Converting a character to a number can be achieved by...

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The back-end

2. Add Two Numbers (Python)

February 5, 2024

by Todd Payne

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On the one hand, the basic operation of the list traversal is examined. On the other hand, the basic operation of the digit addition is...

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The back-end

The square root of Leetcode 69.x

February 5, 2024

by Tiffany Blake

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Leetcode 69. X square root Offer I am participating in the 2022 Spring Recruit Punch card activity. Click here for details. 1. The problem 📑...

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The back-end

237. Delete a node from a linked list

February 5, 2024

by Oliver Butler

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"This is the second day of my participation in the November Gwen Challenge. See details of the event: The last Gwen Challenge 2021". Write a...

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The front end

657. Can the robot return to the origin

February 5, 2024

by Angela Farland

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Small knowledge, big challenge! This article is participating in the creation activity of "Essential Tips for Programmers" original title link 657. Can the robot return...

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The front end

Force-link problem solving — replication of complex linked lists

February 5, 2024

by 賴俊賢

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Small knowledge, big challenge! Please implement copyRandomList function, copy a complex linked list. In complex linked lists, each node has a next pointer to the...

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The back-end

720. Longest word in the dictionary: “simulation” & “dictionary tree”

February 5, 2024

by Lauren Short

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Offer to come, dig friends take it! I am participating in the 2022 Spring Recruit Punch card activity. Click here for details. This is 720...

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