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#include <iostream>
#include <fstream>
using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
int v[20],n;
void afisare(int k)
{
for(int i=1;i<=k;i++)
out<<v[i]<<" ";
out<<'\n';
}
void submultimi(int k)
{for(int i=v[k-1]+1;i<=n;i++)
{ v[k]=i;
afisare(k);
submultimi(k+1);
}
}
int main()
{
in>>n;
v[0]=0;
submultimi(1);
return 0;
}