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