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Cod sursa(job #976922)
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("submultimi.in");
ofstream g("submultimi.out");
int n;
int x[18];
void afis (int k) {
for (int i = 1; i <= k; i++) {
g << x[i] << ' ';
}
g << '\n';
}
void back (int k) {
if (k > 1)
afis(k - 1);
if (k > n) return;
for (int i = x[k-1] + 1; i <= n; i++) {
x[k] = i;
back(k + 1);
}
}
int main()
{
f >> n;
back(1);
return 0;
}