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#include <fstream>
#include <cstdio>
#define NUM 20
int x[NUM];
int n;
using namespace std;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
void afis(int k){
for(int i=1 ; i<=k ; ++i)
g << x[i] << " ";
g << "\n";
}
void backt(int k){
for(int i=x[k-1]+1;i<=n;++i)
{
x[k]=i;
afis(k);
backt(k+1);
}
}
int main()
{
f >> n;
backt(1);
return 0;
}