ile500=kwota/500; //ile potrzebuje 500
kwota=kwota%500;
if (piecs-ile500>=0) //500 tak
{
    piecs=piecs-ile500;

    ile200=kwota/200;
    kwota=kwota%200;

    if(dwiescie-ile200>=0) //200 tak
    {
        dwiescie=dwiescie-ile200;
        ile100=kwota/100;
        kwota=kwota%100;
        if(sto-ile100>=0)  //100 tak
        {
            sto=sto-ile100;
        }
        if(sto-ile100<0) //100 nie
        {
            kwota=(ile100-sto)*100+kwota;
        }
    }

    if(dwiescie-ile200<0) //200 nie
    {
        kwota=(ile200-dwiescie)*200+kwota;
        dwiescie=0;

        ile100=kwota/100;
        kwota=kwota%100;
        if(sto-ile100>=0)  //100 tak
        {
            sto=sto-ile100;
        }
        if(sto-ile100<0) //100 nie
        {
            kwota=(ile100-sto)*100+kwota;
        }
    }
}
if(piecs-ile500<0)//500 nie
{
    kwota=(ile500-piecs)*500+kwota;
    piecs=0;

    ile200=kwota/200;
    kwota=kwota%200;
    if(dwiescie-ile200>=0)  //200 tak
    {
        dwiescie=dwiescie-ile200;

        ile100=kwota/100;
        kwota=kwota%100;
        if(sto-ile100>=0)  //100 tak
        {
            sto=sto-ile100;
        }
        if(sto-ile100<0) //100 nie
        {
            kwota=(ile100-sto)*100+kwota;
        }
    }

    if(dwiescie-ile200<0)// 200 nie
    {
        kwota=(ile200-dwiescie)*200+kwota;
        dwiescie=0;

        ile100=kwota/100;
        kwota=kwota%100;
        if(sto-ile100>=0)  //100 tak
        {
            sto=sto-ile100;
        }
        if(sto-ile100<0) //100 nie
        {
            kwota=(ile100-sto)*100+kwota;
        }
    }
}