linearList02：Remove Duplicates from Sorted Array II
    描述:
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]

   解决方法：

// 2015.7.3
#include <iostream>
using namespace std;
int removeDuplicates(int A[],int n);
void main()
{
    int A[6]={1,1,1,2,2,3};
    cout<<"长度是"<<removeDuplicates(A,6)<<endl;
}
int removeDuplicates(int A[],int n)
{
	if(n<=2) return 0;
	int index=2;
	for(int i=2;i<n;i++)
	{
		if(A[index-2]!=A[i])
		{
			A[index++]=A[i];
		}
	}
	for(int j=0;j<index;j++)
	{
		cout<<A[j]<<endl;
	}
	return index;
}