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#include <fstream>
#define NMAX 18
using namespace std;
int v[18],n;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
void afisare(int k){
for(int i=1;i<=k;i++)
g << v[i] << " ";
g << "\n";
}
void back(int k){
bool valid=true;
for(int i=v[k-1]+1;i<=n;i++){
v[k]=i;
valid=(v[k]<=n);
if(valid){
afisare(k);
back(k+1);
}
}
}
int main()
{
f >> n;
v[0]=0;
back(1);
return 0;
}