学步园

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]

	int del2Dumplicate(int arr[], int len)
	{
		if (len == 0)
		{
			return 0;
		}
		int occur = 1;
		int index = 0;
		for (int i = 1; i < len; i++) 
		{
			if (arr[index] == arr[i]) 
			{
				if (occur < 2) 
				{
					arr[++index] = arr[i];
					occur++;
				}
			} 
			else 
			{
				arr[++index] = arr[i];
				occur = 1;
			}
		}
		return index + 1;
	}