public Difference(int[] elements)
    {
        this.elements = elements;
        this.maximumDifference = 0;
    }

    public int computeDifference()
    {
        Array.Sort(elements);
        
        //getting max and min values and getting the abs difference of them
        maximumDifference = Math.Abs(elements[0] - elements[elements.Length-1]);
        
        return maximumDifference;
    }