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#include <fstream>
#define Nmax 20
using namespace std;
int N, V[Nmax];
ofstream out("submultimi.out");
void Write(int k) {
for(int i = 1; i <= k; i++)
out << V[i] << ' ';
out << '\n';
}
void Back(int k) {
for(int i = V[k-1] + 1; i <= N; i++) {
V[k] = i;
Write(k);
if(i < N)
Back(k + 1);
}
}
void Read() {
ifstream in("submultimi.in");
in >> N;
in.close();
}
int main() {
Read();
Back(1);
out.close();
return 0;
}