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#include <fstream>
using namespace std;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
int N, K, x[19];
void read()
{
f >> N;
}
void afis(int k)
{
for(int i = 1; i <= k; i++)
g << x[i] << ' ';
g << '\n';
}
void backt(int k)
{
for(int i = x[k - 1] + 1; i <= N; i++)
{
x[k] = i;
afis(k);
if(k<N)
backt(k + 1);
}
}
int main()
{
read();
backt(1);
return 0;
}