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]
分析：数组元素最多只能出现两次。
public class Solution { public int removeDuplicates(int[] nums) { if (nums.length <= 2) return nums.length; int index = 2; for (int i = 2; i < nums.length; i++){ if (nums[i] != nums[index - 2]) nums[index++] = nums[i]; } return index; } }
Remove Duplicates from Sorted Array II
原文：http://www.cnblogs.com/zywu/p/5500620.html