Remove Duplicates from Sorted Array II 删除重复元素，重复元素最多允许出现两次

class Solution {

public:

int removeDuplicates(int A[], int n) {

// IMPORTANT: Please reset any member data you declared, as

// the same Solution instance will be reused for each test case.

int index=0;

for(int i=0;i<n;i++)

{

if(i>0&&A[i]==A[i+1]&&A[i]==A[i-1]&&i<n-1)

continue;

A[index++]=A[i];

}

return index;

}

};