摘要： Partition ListGiven a linked list and a valuex, partition it such that all nodes less thanxcome before nodes greater than or equal tox.You should pres... 阅读全文

摘要： Best Time to Buy and Sell Stock IISay you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the ... 阅读全文

摘要： Sort ListSort a linked list inO(nlogn) time using constant space complexity.要求时间复杂度为O(nlogn)，那么不能用quickSort了（最坏O(n^2)），所以使用mergeSort.通常写排序算法都是基于数组的，这题... 阅读全文

摘要： Merge Sorted ArrayGiven two sorted integer arrays A and B, merge B into A as one sorted array.Note: You may assume that A has enough space (size that ... 阅读全文

摘要： Remove ElementGiven an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. ... 阅读全文

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

摘要： Rotate ImageYou are given an n x n 2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up: Could you do this in-place?最简... 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： Implement strStr()Implement strStr().Returns a pointer to the first occurrence of needle in haystack, ornullif needle is not part of haystack.解法一：暴力解c... 阅读全文

摘要： Remove Duplicates from Sorted ArrayGiven a sorted array, remove the duplicates in place such that each element appear only once and return the new len... 阅读全文