Merge two given sorted integer array A and B into a new sorted integer array. Example A=[1,2,3,4] B=[2,4,5,6] return [1,2,2,3,4,4,5,6] Challenge How can you optimize your algorithm if one array is very large and the other is very small? 没什么好说的,Arrayl…

Merge two given sorted integer array A and B into a new sorted integer array. Example A=[1,2,3,4] B=[2,4,5,6] return [1,2,2,3,4,4,5,6] Challenge How can you optimize your algorithm if one array is very large and the other is very small? 此题要求返回新数组.由于可…

两个排好序的数组, A有m个数, 长度够长, B有n个数, 长度为n, 将B放到A里, 不用buffer数组(临时数组), 就用A将两个合在一起, 同时排好序. 方法: 从右边将两个数组里最大的数取出放入A的m+n-1的index处, 从右往左放, 两指针i和j, 直到i和j都等于-1. 注意:时间和空间复杂度: O(m+n) 和 O(1). 空间复杂度即为额外用到的, 这里为0, 即O(1). class Solution { /** * @param A: sorted integer ar…

LintCode 160. Find Minimum in Rotated Sorted Array II (Medium) LeetCode 154. Find Minimum in Rotated Sorted Array II (Hard) 解法1 自己做了半个小时, 想分情况判断num[mid]与num[start], num[mid]与num[end]的大小关系, 每个关系分>, =, <的情况, 于是就是9种情况... >, >, L = M + 1 >, =,…

Given 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 is greater or equal to m + n) to hold additional elements from B. The number of elements initialized in A and B are m …

Remove Duplicates from Sorted Array II Follow up for "Remove Duplicates":What if duplicates are allowed at most twice? For example,Given sorted array A = [1,1,1,2,2,3], Your function should return length = 5, and A is now [1,1,2,2,3].     用两个指针,…

Search in Rotated Sorted Array II Follow up for "Search in Rotated Sorted Array":What if duplicates are allowed? Would this affect the run-time complexity? How and why? Write a function to determine if a given target is in the array.   与I类似,只是在二…

Remove Duplicates from Sorted Array 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 with constant memory.…

Merge Sorted Array OJ: https://oj.leetcode.com/problems/merge-sorted-array/ Given 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 is greater or equal to m + n) to hold add…

Search in Rotated Sorted Array Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If found in the array return its index, otherwise retu…