class IndexForTwoArrays {

    public int compare(double[] a1, double[] a2) {
        if (a1 == a2) {
            return 0;
        }
        int len = Math.min(a1.length, a2.length);
        for (int i = 0; i < len; i++) {
            if (a1[i] != a2[i]) {
                return ((a1[i] > a2[i]) ? 1 : -1);
            }
        }
        return a1.length - a2.length;
    }
}