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#include <iostream>
#include <fstream>
using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
int n,sol[21];
void prelucrare(int k)
{
for(int i=1;i<=k;i++) out<<sol[i]<<" ";
if(k>0)out<<'\n';
}
void bkt(int p)
{
prelucrare(p-1);
for(int i=1+sol[p-1];i<=n;i++)
{
sol[p]=i;
bkt(p+1);
}
}
int main()
{
in>>n;
bkt(1);
return 0;
}