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Given a string containing only '(', ')', '{', '}', '[', ']', check whether the string is valid. An open parenthesis must be closed with a...
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Tag: leetcode
LeetCode Advanced 103- Serpentine Print binary Tree
January 25, 2024
by Anya Ratti
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The core of this question is to strengthen the understanding of binary tree and depth first search DFS and breadth first search BFS understanding, understanding...
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LeetCode advanced – Egg two
January 25, 2024
by 張怡安
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As for "Easter eggs," the bloggers try to bury Easter eggs in every blog post in the series on data structures and algorithms, if possible....
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Leetcode_350 Intersection of two arrays II
January 25, 2024
by Miss Elaine Powell
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Given two arrays, write a function to calculate their intersection. Example 1: Example 2: Description: The number of occurrences of each element in the output...
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LeetCode advanced 232, 225- queue and stack
January 25, 2024
by Rachel Barnes
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Queue structure meets the characteristics of FIFO(First in First out), which is the opposite of stack FILO(First in Last out). The actual stack and queue...
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[Luffy]_ numbers that appear only once
January 25, 2024
by Joshua Collins
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136. The problem describes how given an array of non-empty integers, each element appears twice except for one element. Find me the element that only...
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Binary Tree Paths
January 25, 2024
by Vanessa Copeland
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Given a Binary Tree, return the Paths of all child nodes. This problem is not too difficult. While traversing first, the collection of the parent...
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The shortest bridge [LeetCode && province number] | punch brush
January 25, 2024
by Simon Rose
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Shortest bridge 547. Number of provinces
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High frequency algorithm interview question (36) – Find the sum of numbers from the root node to the leaf node
January 25, 2024
by 秦婷婷
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Brush algorithm, is never to memorize the problem, but to practice the actual problem into a concrete data structure or algorithm model, and then use...
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Leetcode#1. The Sum of Two numbers
January 25, 2024
by Gregory Harris
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Given an array of integers and a target value, find two numbers that neutralize the target value in the array. You can assume that there...
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Leetcode:707. Design lists
January 25, 2024
by James Brown
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Get (index) : Gets the value of the index node in the list. If the index is invalid, -1 is returned.
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[278. The first wrong version] | punch brush
January 25, 2024
by Mary Baker
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https://leetcode-cn.com/problems/first-bad-version/ Given a two-dimensional plane with n points on it, find the maximum number of points on the same line. * * * * example
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LeetCode200. Number of islands
January 25, 2024
by Amy Smith
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Very classic search question. Through the number group, starting from each 1, the depth-first search is conducted to see whether all the positions connected to...
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[Luffy]_leetcode- Finger Offer 22- the k last node in the linked list
January 25, 2024
by Mehul Shan
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Enter a linked list and output the KTH node from last to last in the list. In keeping with the convention of most people, this...
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Best Time to Buy and Sell Stock II
January 25, 2024
by Vedika Dube
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D109 122. Best Time to Buy and Sell Stock II 122. Best Time to Buy and Sell Stock II From a given array, calculate the...
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559. Maximum depth of N fork tree: DFS & BFS
January 25, 2024
by 張佳穎
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"This is the 21st day of my participation in the Gwen Challenge in November. See details of the event: The Last Gwen Challenge 2021". This...
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Switch nodes in a linked list
January 25, 2024
by Alexandra Fowler
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"This is the 11th day of my participation in the November Gwen Challenge. For details, see: the last Gwen Challenge 2021." Swap the KTH and...
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20. Valid brackets | brush and punch
January 25, 2024
by Saira Mahal
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20. Effective brackets given a include only '(',') ', '{','} ', '/', ' 'the string s, determine whether a string is effective. An open parenthesis...
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LeetCode Exploration (vi) : 350_ Intersection of two arrays II
January 25, 2024
by 李冠廷
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Arrays are a common data structure in Javascript. An array has a length attribute and methods like push, pop, and slice, which are commonly used...
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LeetCode into 34- binary lookup
January 25, 2024
by Bethan Connor
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Since the start of the algorithm blog, some readers have questioned the authenticity of the interview questions in the blog. In a previous comment on...
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35. Search for insert location
January 25, 2024
by 洪冠霖
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Given a sorted array and a target value, find the target value in the array and return its index. If the target value does not...
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Several topics take you to learn binary search tree
January 25, 2024
by Alia Andra
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Binary search tree is also called binary sort tree. The result of middle-order traversal binary search tree is an incremental traversal. The root node of...
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Leetcode 7- Integer flip
January 25, 2024
by Fiona Sanders-Freeman
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Small knowledge, big challenge! This article is participating in the creation activity of "Essential Tips for Programmers". You are presented with a 32-bit signed integer...
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25. Merge two sorted lists
January 25, 2024
by Linda Newman
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Enter two incrementally sorted lists and merge them so that the nodes in the new list are still incrementally sorted. Example 1: Limit: 0 <=...
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Leetcode brush problem -20 valid brackets
January 25, 2024
by Mrs. Marie Gardner
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Small knowledge, big challenge! This article is participating in the creation activity of "Essential Tips for Programmers". Leetcode20 - Valid parentheses This article is for...
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LeetCode daily topic, generate | brush bracket clock
January 25, 2024
by Katie Lambert
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The number n represents the logarithm of the generated parentheses. Please design a function that can generate all possibilities
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[Luffy]_leetcode-1721- Switch nodes in the linked list
January 25, 2024
by Manikya Bhatti
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[B station] gives you the head node of the linked list, head, and an integer K. Swap the positive and penultimate KTH nodes of a...
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4 inclusion relationships in arrays (simple)
January 25, 2024
by Wendy Thomas-Wade
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I, preface about in May when I read the questions, I saw an array of questions. At that time, I felt quite confused, but now...
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D113 598. Range Addition II
January 25, 2024
by Nicholas Blake
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D113 598. Range Addition II 598. Range Addition II Specifies the width and height of a two-dimensional array and a two-dimensional array representing operations. In...
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Leetcode 1338. Reduce Array Size to The Half (Python)
January 25, 2024
by Christian Campbell
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Leetcode 1338. Reduce Array Size to The Half (Python
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