public class KuutioidenSumma
{
    protected int summa;
    
    public int kuutioidenSumma(int a, int b)
    {
        summa = 0;
        if (b < a) return -999;
        for (int i = a;i < b; i++)
            {
                System.out.print(i + "^3" + " + ");
                summa = summa + i*i*i;
            }
        summa = summa + b*b*b;
        System.out.print(b + "^3" + " = " + summa);
        
        return summa;
    }
}