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#include <fstream>
using namespace std;
long a[20],sol[20],i,k,n;
ifstream f("combinari.in");
ofstream g("combinari.out");
void afis()
{
int i;
for (i=1;i<=n;i++)
g<<a[sol[i]]<<" ";
g<<endl;
}
void bac(int k)
{
int i;
if (k>n) afis();
else
for (i=sol[k-1]+1;i<=n;i++)
{
sol[k]=i;
bac(k+1);
}
}
int main()
{f>>n;k=n;
for (i=1;i<=n;i++) a[i]=i;
bac(1);
return 0;
}