void sterge(nod*&p)
{

    while(p!=NULL&&p->info%2==0)
    {
        nod*q=p;
        p=p->urm;
        delete q;
    }
    nod*d=p;
    if (d!=NULL)
        while (d->urm!=NULL)
        {
            if (d->urm->info%2==0)
            {
                nod*q=d->urm;
                d->urm=q->urm;
                delete q;
            }
            else
                d=d->urm;
        }
}