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#include <iostream>
#include <fstream>
#define N 20
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int n;
int x[N];
void Write(int K)
{int i;
for(i=1;i<=K;i++)
fout<<x[i]<<" ";
fout<<"\n";
}
void Back(int k)
{int i;
for(i=x[k-1]+1;i<=n;i++)
{x[k]=i;
Write(k);
if(x[k]<n) Back(k+1);
}
}
int main()
{fin>>n;
Back(1);
fin.close();
fout.close();
return 0;
}