摘要： Word SearchGiven a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, wh... 阅读全文

摘要： Decode WaysA message containing letters fromA-Zis being encoded to numbers using the following mapping:'A' -> 1'B' -> 2...'Z' -> 26Given an encoded me... 阅读全文

摘要： Remove Duplicates from Sorted Array IIFollow up for "Remove Duplicates":What if duplicates are allowed at mosttwice?For example,Given sorted array A =... 阅读全文

摘要： Two SumGiven an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the... 阅读全文

摘要： Linked List CycleGiven a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?解法一：使用unordered_map记录当前节点... 阅读全文

摘要： 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 example, given... 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： Populating Next Right Pointers in Each NodeGiven a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLi... 阅读全文

摘要： Linked List Cycle IIGiven a linked list, return the node where the cycle begins. If there is no cycle, returnnull.Follow up:Can you solve it without u... 阅读全文

摘要： Jump GameGiven an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents yo... 阅读全文