David_Jett

题目链接Given an array of2nintegers, your task is to group these integers intonpairs of integer, say (a1, b1), (a2, b2), ..., (an, bn) which makes sum of min(ai, bi) for all i from 1 to n as l...

题目链接：https://leetcode.com/problems/maximum-depth-of-binary-tree/题面：104.Maximum Depth of Binary TreeEasy135254FavoriteShareGiven a binary tree, find its maximum depth.The maximum depth is ...

题目链接：https://leetcode.com/problems/maximum-depth-of-n-ary-tree/题面：559.Maximum Depth of N-ary TreeEasy35920FavoriteShareGiven a n-ary tree, find its maximum depth.The maximum depth is the ...

题目链接：https://leetcode.com/problems/sort-array-by-parity-ii/题面：922.Sort Array By Parity IIEasy29629FavoriteShareGiven an arrayAof non-negative integers, half of the integers in A are odd, ...

题目链接：https://leetcode.com/problems/occurrences-after-bigram/题面：1078.Occurrences After BigramEasy3138FavoriteShareGiven wordsfirstandsecond, consider occurrences in sometextof the form ...

题目链接：https://leetcode.com/problems/n-ary-tree-preorder-traversal/题面：589.N-ary Tree Preorder TraversalEasy23135FavoriteShareGiven an n-ary tree, return thepreordertraversal of its nodes' v...

题目链接：https://leetcode.com/problems/n-ary-tree-postorder-traversal/题面：590.N-ary Tree Postorder TraversalEasy29137FavoriteShareGiven an n-ary tree, return thepostordertraversal of its nodes...

题目链接：933. Number of Recent Calls题面：933.Number of Recent CallsEasy133647FavoriteShareWrite a classRecentCounterto count recent requests.It has only one method:ping(int t), where t repre...

题目链接：763. Partition Labels题面：763.Partition LabelsMedium96954FavoriteShareA stringSof lowercase letters is given. We want to partition this string into as many parts as possible so that ea...

题目链接：https://leetcode.com/problems/single-number/题面：136.Single NumberEasy251694FavoriteShareGiven anon-emptyarray of integers, every element appearstwiceexcept for one. Find that single...

题目链接：https://leetcode.com/problems/binary-tree-inorder-traversal/题面：94.Binary Tree Inorder TraversalMedium166372FavoriteShareGiven a binary tree, return theinordertraversal of its nodes' ...

题目链接：https://leetcode.com/problems/matrix-cells-in-distance-order/题面：1030.Matrix Cells in Distance OrderEasy7240FavoriteShareWe are given a matrix withRrows andCcolumns has cells with i...

题目链接：https://leetcode.com/problems/majority-element/题面：169.Majority ElementEasy1714152FavoriteShareGiven an array of sizen, find the majority element. The majority element is the element t...

题目链接：https://leetcode.com/problems/contains-duplicate/题面：217.Contains DuplicateEasy405524FavoriteShareGiven an array of integers, find if the array contains any duplicates.Your function s...

题目链接：https://leetcode.com/problems/valid-anagram/题面：242.Valid AnagramEasy729109FavoriteShareGiven two stringssandt, write a function to determine iftis an anagram ofs.Example 1:...

题目链接：https://leetcode.com/problems/subsets/题面：78.SubsetsMedium199151FavoriteShareGiven a set ofdistinctintegers,nums, return all possible subsets (the power set).Note:The solution set...

题目链接：https://leetcode.com/problems/move-zeroes/题面：283.Move ZeroesEasy208477FavoriteShareGiven an arraynums, write a function to move all0's to the end of it while maintaining the relative...

题目链接：题面：238.Product of Array Except SelfMedium2317197FavoriteShareGiven an arraynumsofnintegers wheren> 1, return an arrayoutputsuch thatoutput[i]is equal to the product of al...

题目链接：https://leetcode.com/problems/generate-parentheses/题面：22.Generate ParenthesesMedium2848177FavoriteShareGivennpairs of parentheses, write a function to generate all combinations of we...

题目链接：LeetCode 1021题面：1021.Remove Outermost ParenthesesEasy122181FavoriteShareA valid parentheses string is either empty(""),"(" + A + ")", orA + B, whereAandBare valid parentheses st...

题目链接：https://leetcode.com/problems/binary-search-tree-to-greater-sum-tree/题面：1038.Binary Search Tree to Greater Sum TreeMedium14918FavoriteShareGiven the root of a binarysearchtree with d...

题目链接题面：575. Distribute CandiesDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneGiven an integer array withevenlength, where different numbers in this array represent differen...

题目链接题目：344. Reverse StringDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneWrite a function that takes a string as input and retur

题目链接题面：Add to List665. Non-decreasing ArrayDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneGiven an array withnintegers, your task is to check if it could become non...

题目链接题面：Add to List496. Next Greater Element IDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneYou are given two arrays(without duplicates)nums1andnums2wherenums1’...

题目链接题面：Add to List503. Next Greater Element IIDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneGiven a circular array (the next element of the last element is the first...

题目链接题面：2. Add Two NumbersDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneYou are given twonon-emptylinked lists representing two non-negative integers. The digits are sto...

3. Longest Substring Without Repeating CharactersDescription： Given a string, find the length of the longest substring without repeating characters.Examples: Given “abcabcbb”, the answer is “abc”, wh

题目链接题面：Add to List657. Judge Route CircleDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneInitially, there is a Robot at position (0, 0). Given a sequence of its moves, judge if...

题目链接题面：557. Reverse Words in a String IIIDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneGiven a string, you need to reverse the order of characters in each word within a s...

题目链接题面：500. Keyboard RowDescriptionHintsSubmissionsDiscussSolutionDiscussPick OneGiven a List of words, return the words that can be typed using letters ofalphabeton only one row'...

题目链接 Description： You’re now a baseball game point recorder.Given a list of strings, each string can be one of the 4 following types:Integer (one round’s score): Directly represents the number of poi

题目链接题面： A self-dividing number is a number that is divisible by every digit it contains.For example, 128 is a self-dividing number because 128 % 1 == 0, 128 % 2 == 0, and 128 % 8 == 0.Also, a self-div

题目链接：Remove Duplicates from Sorted List题面：Remove Duplicates from Sorted ListTotal Accepted:58257Total Submissions:168776My SubmissionsQuestionSolutionGiven a sorted linked lis...

题目链接TheHamming distancebetween two integers is the number of positions at which the corresponding bits are different.Given two integersxandy, calculate the Hamming distance.Note:0 ≤x,y&...

题目链接There is a tableWorld+-----------------+------------+------------+--------------+---------------+| name | continent | area | population | gdp |+--------...

题目链接Given a tablesalary, such as the one below, that has m=male and f=female values. Swap all f and m values (i.e., change all f values to m and vice versa) with a single update query and no ...

题目链接Given two binary trees and imagine that when you put one of them to cover the other, some nodes of the two trees are overlapped while the others are not.You need to merge them into a new...

题目链接Given a positive integer, output its complement number. The complement strategy is to flip the bits of its binary representation.Note:The given integer is guaranteed to fit within the ...

题目链接：https://leetcode.com/problems/recover-a-tree-from-preorder-traversal/题面：1028.Recover a Tree From Preorder TraversalHard1625FavoriteShareWe run apreorderdepth first search on theroot...