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#include <iostream>
#include <fstream>
#define nmax 25
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int n,sol[nmax];
void afisare(int k)
{
for(int i =1 ; i <= k ; i++)
fout<<sol[i]<<" ";
fout<<'\n';
}
void answer(int k)
{
for(int i = sol[k-1]+1 ; i <= n ; i++)
{
sol[k]=i;
afisare(k);
answer(k+1);
}
}
int main()
{
fin>>n;
answer(1);
return 0;
}