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#include <fstream>
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int x[17];
void afisare(int k)
{
for(int i=1; i <= k; i++)
fout << x[i] << " ";
fout << '\n';
}
void backtrack(int k, int n)
{
for(int i = x[k - 1] + 1 ; i <= n ; i++)
{
x[k]=i;
afisare(k);
backtrack(k + 1, n);
}
}
int main()
{
int n;
fin >> n;
backtrack(1, n);
return 0;
}