#include <iostream>
#include <fstream>
using namespace std;
typedef struct nod
{
    int info;
    nod *urm;
}TNOD;
TNOD *p;
void creare(TNOD *&p)
{
    TNOD *nou;
    if(p==NULL)
    {
        p=new TNOD;
        cin >> p->info;
        p->urm=NULL;
    }
    else
    {
        nou=new TNOD;
        cin >> nou->info;
        nou->urm=p;
        p=nou;
    }
}
void stergere_p(TNOD *&p)
{
    p=p->urm;
}
void stergere_u(TNOD *&p)
{
    r=p;
    while(r!=NULL)
    {
        if(r->urm==NULL)
            r->urm=NULL;
        r=r->urm;
    }
}
void stergere(TNOD *&p)
{

}
int main()
{

    return 0;
}