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Cod sursa(job #931336)
#include <fstream>
using namespace std;
int x[17], n;
ofstream g;
void afisare (int k) {
int i;
for (i=1; i<=k;i++) g << x[i] << ' ';
g << '\n';
}
void back (int k) {
int i;
for (i=x[k-1]+1; i<=n; i++) {
x[k] = i;
afisare(k);
back(k+1);
}
}
int main () {
ifstream f ("submultimi.in");
f >> n;
f.close();
g.open ("submultimi.out");
back(1);
g.close();
return 0;
}