[10:57, 4.3.2019] Mircea: #include <fstream>
int st[100],n;
using namespace std;
ifstream cin("submultimi.in");
ofstream cout("submultimi.out");
void afisare(int p)
{
    for(int i=1; i<=p; ++i)
        cout<<st[i]<<" ";
    cout<<'\n';
}
void back(int p)
{
    int pval;
    for(pval=st[p-1]+1; pval<=n; ++pval)
    {
        st[p]=pval;
        afisare(p);
        back(p+1);
    }
}

int main()
{
    cin>>n;
    back(1);
    return 0;
}