Every 3 days one leetcode, the second question: LongestSubstringWithoutRepeatingCharacters
1. Find the longest substring without repetition
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Tag: leetcode
Leetcode_825 Age appropriate friend
January 26, 2024
by Miss Kathleen Wilson
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Asking people to send each other friend requests, now given an array of their ages, ages[I] is the age of the ith person. A cannot...
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Leetcode_61 rotary linked list
January 26, 2024
by Judith Smith-Potter
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To give you the head of a linked list, rotate the list and move each node k positions to the right. Example 1: Example 2:...
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5. Longest Palindromic Substring
January 26, 2024
by 崔淑華
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5. If the Longest Palindromic Substring is s, run the following command to retrieve the Longest Palindromic Substring: Given a string S, find the longest...
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The longest mountain in the leetCODE_845 array
January 26, 2024
by Eileen Edwards
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Ask us to call any continuous subarray B in array A A "mountain" that satisfies the following properties: B.Length >= 3 There exists 0 <...
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Leetcode_34 looks for the first and last positions of elements in the sorted array
January 26, 2024
by 楊志宏
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You are given an ascending array of integers, nums, and a target value, target. Find the starting and ending positions of the given target value...
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227. Basic calculator II
January 26, 2024
by Lori Lopez
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"This is the 15th day of my participation in the December Gwen Challenge. Check out the details: The last Gwen Challenge 2021" 227. Basic calculator...
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[Luffy]_ Old White algorithm Learning Note 06(eldest son sequence)
January 26, 2024
by Mr. Gary Morris
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Today we will learn an algorithm problem (the oldest sequence), with the general idea is not good to find the answer, here we use the...
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Longest common substring & longest common subsequence
January 26, 2024
by John Maldonado
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The most important thing in dynamic programming is to find the subproblems that can be recursed, and then list the recursion formula, and finally search...
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9. Palindrome Number
January 26, 2024
by Dr. Roy Jones
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A number is a palindrome number. According to the definition of palindrome numbers, negative numbers are not acceptable. After all, there is a sign constraint....
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【 data structure 】 Binary tree: LeetCode题 (A) Preorder traversal of binary trees, 145. Postorder traversal of binary trees, 102
January 26, 2024
by Dr. Ian Little
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Before the beginning of the article, first put a portal binary tree characteristics and Java implementation OF DFS, BFS. So, in this article, we will...
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Leetcode 144. Binary tree preorder traversal JavaScript version
January 26, 2024
by 劉中山
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You are given the root node of the binary tree, root, and return a sequential traversal of its node values. Example 1: input: root =...
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leetCode 5 Longest Palindromic Substring
January 26, 2024
by 熊雅萍
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Given a string, outputs the longest substring of a loop. A palindrome string is a string that reads the same in both positive and negative...
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LeetCode Exploration (8) : 21_ Merge two ordered lists
January 26, 2024
by Darshit Loyal
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In data structures and algorithms, a linked list is a non-sequential and non-sequential storage structure on a physical storage unit. The logical order of data...
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Leetcode 1610. Maximum Number of Visible Points (python)
January 26, 2024
by Eva Barr
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Leetcode 1610. Maximum Number of Visible Points (python
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Leetcode 1606. Find Servers That Handled Most of Requests (Python)
January 26, 2024
by Purab Datta
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Leetcode 1606. Find Servers That handle the Most Handled Number of Requests (Python
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[Luffy]_leetcode-331- Verifies the sequential serialization of the binary tree
January 26, 2024
by Kathy Manning
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One way to serialize a binary tree is to use a pre-order traversal. When we encounter a non-empty node, we can record the value of...
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Tree traversal the maximum depth of the binary tree
January 26, 2024
by Shayak Krishnan
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Given a binary tree, find the depth from the root node to the farthest leaf node. The tree traversal has four kinds: preorder traversal. The...
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Leetcode — String column
January 26, 2024
by Lavanya Khosla
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Title quick review with leetcode link reverse string reverse string II refers to Offer 05. Replace Spaces and flip the word in the string pointing...
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☆ Punch card algorithm ☆LeetCode 13, Roman numeral to integer algorithm parsing
January 26, 2024
by 潘宜君
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Small knowledge, big challenge! This article is participating in the creation activity of "Essential Tips for Programmers". Hello, everyone, I am a little Magic dragon,...
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226. Flipping binary trees, recursion, JavaScript, detailed comments
January 26, 2024
by Sienna Hart
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The first thing to do with recursion is to think about what to do if the current recursive function is running the NTH recursion. The...
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LeetCode6: ZigZag Conversion
January 26, 2024
by Arnav Dube
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Arranges a given string in a zigzagging pattern from top to bottom and left to right according to the given number of lines. After that,...
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34. Find the first and last position of an element in a sorted array [medium]
January 26, 2024
by Jorge Coffey
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Given an array of integers in ascending order, nums, and a target value, target. Find the starting and ending positions of the given target value...
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The traversal symmetric binary tree of a tree
January 26, 2024
by Rebecca O'Brien
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Given a binary tree, you need to determine whether it is symmetric along the central axis. Conclusion: There are four kinds of tree traversal: preorder...
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Leetcode_13 Roman numeral to integer
January 26, 2024
by Robert Carpenter
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Roman numerals are required to contain the following seven characters: I, V, X, L, C, D and M. For example, the Roman numeral 2 is...
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LeetCode -13. Roman numerals to integers | brush questions punched
January 26, 2024
by Harriet Simpson-Cox
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Nezha's life creed: If you like what you learn, there will be strong motivation to support it. LeetCode -104. Maximum depth of binary tree, figure...
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LeetCode one question of the day, valid parentheses
January 26, 2024
by Yashvi Tella
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The title valid parentheses https://leetcode-cn.com/problems/valid-parentheses/ describe given a string s containing only '(', ')', '{', '}', '[', ']'
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☆ Punch card algorithm ☆LeetCode 12, integer to Roman numeral algorithm parsing
January 26, 2024
by Scott Hughes
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Small knowledge, big challenge! This article is participating in the creation activity of "Essential Tips for Programmers". Hello, everyone, I am a little Magic dragon,...
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LeetCode an occasional question — 20. Valid parentheses
January 26, 2024
by 賈淑貞
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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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Vernacular recursion: the recursion thought summed up by the binary tree force deduction
January 26, 2024
by Harriet Thompson-Hughes
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Recently in brush force buckle binary tree related problems, found that many problems need to be solved by recursion, or many problems solved by recursion...
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