problemaliste

#include <iostream>
#include <fstream>
using namespace std;
struct nod
{
    int info;
    nod *dr,*st;
};
nod *prim,*ultim;
ifstream f("date.in");
void creare()
{
    nod *nou;
    int x;
    while(f>>x)
        if(prim==NULL)
    {
        prim=new nod;
        prim->info=x;
        prim->st=NULL;
        ultim=prim;
    }
    else

    {
        nou=new nod;
        nou->info=x;
        nou->st=ultim;
        ultim->dr=nou;
        ultim=nou;
    }
    ultim->dr=NULL;
}

void parcurgere_st()
{
    nod *p=ultim;
    while(p!=NULL)
    {
        if(p->info%2==1)
            cout<<p->info<<" ";
        p=p->st;
    }
    cout<<'\n';
}

void parcurgere_dr()
{
    nod *p=prim;
    while(p!=NULL)
    {
        if(p->info%2==1)
            cout<<p->info<<" ";
        p=p->dr;
    }

void inserare()
{
    nod *p=prim;
    while(p->info%2==0 && p!=NULL)


    p=p->dr;
    if(p!=NULL)
    {
        nod *nou;
        nou=new nod;
        nou->info=p->info*p->info;
        nou->dr=p->dr;
        nou->st=p;
        p->dr->st=nou;
        p->dr=nou;
    }
}

void stergere()
{
    //stergem ultimul nod cu info para;

    nod *p=ultim,*q,*r;
    while(p->info%2==1 && p!=NULL)
        p=p->st;
    q=p->dr;
    r=p->st;
    r->dr=q;
    q->st=r;
    delete p;
}

int main()
{
    creare();
    parcurgere_st();
    parcurgere_dr();
    inserare();
    stergere();
    return 0;

}