struct element
{
    int liczba;
    element* next;
};

void add(element* &stos)
{
    element*el=new element;
    el->liczba=7;
    el->next=stos;
    stos=el;
}

void deletee(element* &stos)
{
    element*temp=stos;
    stos=stos->next;
    delete temp;
}