摘要：LeetCode: Populating Next Right Pointer in Each NodeGiven a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; ... 阅读全文

摘要：LeetCode: pascal's TriangleGiven numRows, generate the first numRows of Pascal's triangle. For example, given numRows = 5,Return[ [1], [1,1], ... 阅读全文

摘要：LeetCode: TriangleGiven a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below. For exa... 阅读全文

摘要：LeetCode: Best Time to Buy and Sell StockSay you have an array for which the ith element is the price of a given stock on day i.If you were only permi... 阅读全文

摘要：LeetCode: Binary Tree Maximum Path SumGiven a binary tree, find the maximum path sum.The path may start and end at any node in the tree. For example:G... 阅读全文

摘要：LeetCode: Valid PalindromeGiven a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example,"A... 阅读全文

摘要：LeetCode: Word LadderGiven two words (start and end), and a dictionary, find the length of shortest transformation sequence from start to end, such th... 阅读全文

摘要：LeetCode: Longest Consecutive SequenceGiven an unsorted array of integers, find the length of the longest consecutive elements sequence. For example,G... 阅读全文

摘要：LeetCode: Sum Root to Leaf NumbersGiven a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number.An example is t... 阅读全文

摘要：LeetCode: Surrounded RegionsGiven a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'.A region is captured by flipping all 'O's i... 阅读全文

摘要：LeetCode: Palindrome PartitionGiven a string s, partition s such that every substring of the partition is a palindrome.Return all possible palindrome ... 阅读全文

摘要：LeetCode: Clone GraphClone an undirected graph. Each node in the graph contains a label and a list of its neighbors.OJ's undirected graph serializatio... 阅读全文

摘要：LeetCode: Gas StationThere are N gas stations along a circular route, where the amount of gas at station i is gas[i].You have a car with an unlimited ... 阅读全文

摘要：LeetCode: CandyThere are N children standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to th... 阅读全文

摘要：LeetCode: Single NumberGiven an array of integers, every element appears twice except for one. Find that single one. Note:Your algorithm should have a... 阅读全文

摘要：LeetCode: Copy List with Random PointerA linked list is given such that each node contains an additional random pointer which could point to any node ... 阅读全文

摘要：LeetCode: Word BreakGiven a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more di... 阅读全文

摘要：LeetCode: Linked List CycleGiven a linked list, determine if it has a cycle in it. Follow up:Can you solve it without using extra space?地址：https://oj.... 阅读全文

摘要：LeetCode: Reorder List Given a singly linked list L: L0→L1→…→Ln-1→Ln,reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→…You must do this in-place without altering ... 阅读全文

摘要：LeetCode: Binary Tree Traversal题目：树的先序和后序。后序地址：https://oj.leetcode.com/problems/binary-tree-postorder-traversal/先序地址：https://oj.leetcode.com/problems/... 阅读全文