void srednia(list *& H)
{
    list *p = H;
    list *la=H;
    int suma;
    suma = 0;
    while (p->next)
    {
        suma = suma + (p->value);
        p = p->next;
        la = p;
    }
    int N = count(H);
    double srednia = suma / N;
    list *tmp = la;
    list *pre = p;
    p = H;

    do
    {
        if ((H->value) > srednia)
        {
            H = H->next;
            (tmp->next)=p;
            (p->next) = NULL;
            tmp = p;
            p = H;

        }
        else
        {
            if ((p->value) > srednia)
            {
                (pre->next) = (p->next);
                (tmp->next) = p;
                (p->next) = NULL;
                tmp = p;
                p = pre->next;

            }
            else
            {
                pre = p;
                p = p->next;
            }
            
        }
    } while (p != la);
}