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#include <fstream>
using namespace std;
int n,sol[20],m;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
void afis(int k)
{int i;
for (i=1;i<=k;i++)
g<<sol[i]<<" ";
g<<'\n';
}
void back(int k)
{int i;
if (k<=n)
{for (i=sol[k-1]+1;i<=n;i++)
{sol[k]=i;
afis(k);
back(k+1);
}
}
}
int main()
{f>>n;
int i;
back(1);
return 0;
}