#include <iostream>

using namespace std;
struct nod
{
    int inf;
    nod *next;
};
nod *prim;
void creare (nod *&prim)
{
     int n,i;
    nod *p,*q;
    cout<<"Dati numarul de elemente: ";
    cin>>n;
    prim=new(nod);
    cout<<"Informatia 1= ";
    cin>>prim->inf;
    prim->next=NULL;
    p=prim;
    for (i=2; i<=n; i++)
    {
        q=new(nod);
        cout<<"Informatia "<<i<<"= ";
        cin>>q->inf;
        q->next=NULL;
        p->next=q;
        p=q;
    }
}
void add(nod* &prim)
{
    nod *p,*q;
    if (prim==NULL)
    {
        prim=new(nod);
        cin>>prim->inf;
        prim->next=NULL;
    }
    else
    {
        p=prim;
        q=new(nod);
        while (p->next)
            p=p->next;
        q=new(nod);
        cin>>q->inf;
        q->next=NULL;
        p->next=q;

    }
}
void sterg(nod* &prim)
{
    nod *q,*p;
    if (prim==NULL)
        cout<<"Nu ai ce sa stergi...";
    else
    {
        p=prim;
        prim=p->next;
        delete p;
    }
}
void afis(nod* &prim)
{
    nod *p=prim;
    while (p)
    {
        cout<<p->inf<<" ";
        p=p->next;
    }
    cout<<endl;
}

int main()
{
   creare(prim);
    afis(prim);
    add(prim);
    afis(prim);
    sterg(prim);
    afis(prim);
}