Just DO IT by luckygxf

摘要： Majority ElementGiven an array of sizen, find the majority element. The majority element is the element that appears more than⌊ n/2 ⌋times.You may ass... 阅读全文

摘要： Longest Palindromic SubstringGiven a stringS, find the longest palindromic substring inS. You may assume that the maximum length ofSis 1000, and there... 阅读全文

摘要： Excel Sheet Column TitleGiven a non-zero positive integer, return its corresponding column title as appear in an Excel sheet.For example: 1 -> A ... 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： Surrounded RegionsGiven a 2D board containing'X'and'O', capture all regions surrounded by'X'.A region is captured by flipping all'O's into'X's in that... 阅读全文

摘要： Compare Version NumbersCompare two version numbersversion1andversion1.Ifversion1>version2return 1, ifversion1 Integer.valueOf(ver2_ch[i]))10 ... 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： Sort ListSort a linked list inO(nlogn) time using constant space complexity.这道题我想过用直接插入，超时了。百度了一下，用的是归并排序，排序以前用的都是数组，这次用链表，不太习惯参考：http://blog.csdn.net... 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： Flatten Binary Tree to Linked ListGiven a binary tree, flatten it to a linked list in-place.For example,Given 1 / \ 2 5 / ... 阅读全文