private static boolean equalLists(int[] l1, int[] l2) {
		if (l1 != null && l2 != null && l1.length == l2.length) {
			for (int i = 0; i < l1.length; i++) {
				if (l1[i] != l2[i]) {
					return false;
				}
			}
			return true;
		} else {
			return false;
		}
	}