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Cod sursa(job #264910)
#include <fstream>
using namespace std;
fstream f;
fstream g;
int n;
int st[10];
int valid(int k)
{
for(int i=1;i<k;i++)
if(st[k]==st[i])
return 0;
return 1;
}
void afis()
{
for(int i=1;i<=n;i++)
g << st[i] << " ";
g << "\n";
}
void back(int k)
{
int i;
for(i=1;i<=n;i++)
{
st[k]=i;
if(valid(k))
if(k==n)
afis();
else
back(k+1);
}
}
int main()
{
f.open("permutari.in",fstream::in);
f >> n;
f.close();
g.open("permutari.out",fstream::out);
back(1);
g.close();
return 0;
}