ahfytao

题目： Given a sorted array, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate extra space for another array, you must do this in place

Given an array of strings, group anagrams together. For example, given: ["eat", "tea", "tan", "ate", "nat", "bat"],  Return: [ ["ate", "eat","tea"], ["nat","tan"], ["bat"] ] Note:

You are a product manager and currentlyleading a team to develop a new product. Unfortunately, the latest version ofyour product fails the quality check. Since each version is developed based onthe pr

原题如下： Median is the middle value in an ordered integer list. If the size of the list is even, there is no middle value. So the median is the mean of the two middle value. Examples:  [2,3,4] , the

Given 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 surrounded region. For example, X X X X X O O X X X O