Method rightRotate

src/class148/FollowUp1.java:51–58

(int i)

	}

	public static int rightRotate(int i) {
		int l = left[i];
		left[i] = right[l];
		right[l] = i;
		up(i);
		up(l);
		return l;
	}

	public static int maintain(int i) {
		int lh = height[left[i]];