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#include <fstream>
#define VAL 25
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int N, i;
int v[VAL];
void afisare(int K)
{
int i;
for (i=1; i<=K; i++)
fout << v[i] << " ";
fout << '\n';
}
int back(int K)
{
int i;
for (i=v[K-1]+1; i<=N; i++)
{
v[K]=i;
afisare(K);
back(K+1);
}
}
int main()
{
fin >> N;
back(1);
fin.close();
fout.close();
return 0;
}