CODE 53. Remove Duplicates from Sorted Array II

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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].

public int removeDuplicates(int[] A) {
		// IMPORTANT: Please reset any member data you declared, as
		// the same Solution instance will be reused for each test case.
		if (A.length <= 0) {
			return 0;
		}
		int length = A.length;
		int cur = 0;
		int nxt = 1;
		boolean morethan2 = false;
		for (; nxt < A.length; nxt++) {
			if (A[nxt] != A[nxt - 1]) {
				A[cur] = A[nxt - 1];
				cur++;
				morethan2 = false;
			} else if (!morethan2) {
				A[cur] = A[nxt - 1];
				cur++;
				morethan2 = true;
			} else {
				length--;
			}
		}
		A[cur] = A[nxt - 1];
		return length;
	}