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#include <iostream>
#include <fstream>
#define DMAX 17
using namespace std;
ifstream in("submultimi.in");
ofstream out("submultimi.out");
int n;//data de intrare
int st[DMAX], varf;
void citire(){
in >> n;
}
void afisare(int vf){
for(int i = 1; i <= vf; i++){
out << st[i] <<' ';
}
out << '\n';
}
void bkt(int vf){
for(int i = st[vf - 1] + 1; i<= n; i++){
st[vf] = i;
if(vf <= n){
afisare(vf);
}
if(vf < n){
bkt(vf + 1);
}else{
vf--;
}
}
}
int main() {
citire();
varf = 1;
bkt(varf);
return 0;
}