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#include <fstream>
using namespace std;
ifstream fin("submultimi.in");
ofstream fout("submultimi.out");
int n, x[22];
void backtracking(int pas)
{
if(pas==n+1)
{
for(int i=1; i<=n; i++)
{
if(x[i]==1){fout<<i<<" ";}
}
fout<<"\n";
return;
}
for(int i=1;i>=0;i--)
{
x[pas]=i;
backtracking(pas+1);
}
}
int main()
{
fin>>n;
backtracking(1);
return 0;
}