Method leftRotate

src/class148/FollowUp1.java:42–49

(int i)

	}

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

	public static int rightRotate(int i) {
		int l = left[i];