摘要：https://leetcode.com/problems/word-search-ii/description/ Given a 2D board and a list of words from the dictionary, find all words in the board. Each 阅读全文

摘要：https://leetcode.com/submissions/detail/32662938/Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST... 阅读全文

摘要：Unique Paths IITotal Accepted:31019Total Submissions:110866My SubmissionsQuestionSolutionFollow up for "Unique Paths":Now consider if some obstacles a... 阅读全文

摘要：A robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below).The robot can only move either down or right at any point ... 阅读全文

摘要：Remove Nth Node From End of ListTotal Accepted:46720Total Submissions:168596My SubmissionsQuestionSolutionGiven a linked list, remove thenthnode from ... 阅读全文

摘要：Convert Sorted List to Binary Search TreeGiven a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST.... 阅读全文

摘要：Unique Binary Search Trees IIGiven n, generate all structurally unique BST's (binary search trees) that store values 1...n.For example,Given n = 3, yo... 阅读全文

摘要：Largest NumberGiven a list of non negative integers, arrange them such that they form the largest number.For example, given [3, 30, 34, 5, 9], the lar... 阅读全文

摘要：PermutationSequence https://oj.leetcode.com/problems/permutation-sequence/The set [1,2,3,…,n] contains a total of n! unique permutations.By listing a... 阅读全文

摘要：Next PermutationImplement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangemen... 阅读全文

摘要：SubsetsGiven a set of distinct integers, S, return all possible subsets.Note:Elements in a subset must be in non-descending order.The solution set mus... 阅读全文

摘要：Recover Binary Search TreeTwo elements of a binary search tree (BST) are swapped by mistake.Recover the tree without changing its structure.Note:A sol... 阅读全文

摘要：Find Peak ElementA peak element is an element that is greater than its neighbors.Given an input array wherenum[i] ≠ num[i+1], find a peak element and ... 阅读全文

摘要：Valid ParenthesesGiven a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must clos... 阅读全文

摘要：First Missing PositiveGiven an unsorted integer array, find the first missing positive integer.For example,Given[1,2,0]return3,and[3,4,-1,1]return2.Yo... 阅读全文

摘要：Best Time to Buy and Sell Stock IIIQuestion SolutionSay you have an array for which the ith element is the price of a given stock on day i.Design an a... 阅读全文

摘要：Best Time to Buy and Sell Stock IIQuestion SolutionSay you have an array for which the ith element is the price of a given stock on day i.Design an al... 阅读全文

摘要：Best Time to Buy and Sell StockSay you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to compl... 阅读全文

摘要：Construct Binary Tree from Inorder and Postorder TraversalGiven inorder and postorder traversal of a tree, construct the binary tree.Note:You may assu... 阅读全文

摘要：Construct Binary Tree from Preorder and Inorder TraversalGiven preorder and inorder traversal of a tree, construct the binary tree.Note:You may assume... 阅读全文