#include<bits/stdc++.h>
using namespace std;
ifstream fin("arbore2.txt");
struct ARB{int nod;
           ARB *S, *D;};
ARB *R;
int n;
void inserare(ARB *&c,int k)
{
if(c)
    {if(c->nod<k)
        inserare(c->D,k);
    else
        inserare(c->S,k);}
else
    {c=new ARB;
    c->nod=k;
    c->S=c->D=NULL;}
}

void SVD(ARB *a)
{
    if(a)
    {
        SVD(a->S);
        cout<<a->nod<<" ";
        SVD(a->D);
    }
}
int main()
{
cout<<"Nod= ";
cin>>n;
while(n!=0)
{
    inserare(R,n);
    cout<<"Nod= ";
    cin>>n;}


    cout<<"SVD = ";
    SVD(R);
}