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#include <iostream>
#include <fstream>
using namespace std;
int n, v[20];
ofstream g("submultimi.out");
void print(int k)
{
int i;
for(i = 0 ; i < k ; i++)
g << v[i] << " ";
g << '\n';
}
void BKT(int k, int lst)
{
int i;
if(k <= n)
for(i = lst; i <= n; i++)
{
v[k-1] = i;
print(k);
BKT(k + 1, i + 1);
}
}
int main()
{
ifstream f("submultimi.in");
f >> n;
BKT(1, 1);
return 0;
}