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Cod sursa(job #830046)
#include <fstream>
using namespace std;
ofstream g; int n, x[9], viz[9];
void solutie () {
int i;
for (i=1; i<=n; i++)
g << x[i] <<' ';
g << '\n';
}
void back (int k) {
int i;
for (i=1; i<=n; i++) {
x[k] = i;
if (!viz[i]) {
viz[i] = 1;
if (k == n) solutie();
else back(k+1);
viz[i] = 0;
}
}
}
int main () {
ifstream f ("permutari.in");
f >> n;
f.close();
g.open ("permutari.out");
back(1);
g.close();
return 0;
}