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Cod sursa(job #528418)
#include <fstream>
using namespace std;
int n,A[9];
ifstream f ("permutari.in");
ofstream g ("permutari.out");
void bt(int k)
{
int i,j,ok;
if (k==n)
{
for (i=1;i<=n;i++)
g<<A[i]<<" ";
g<<endl;
}
else
{
for (i=1;i<=n;i++)
{
A[k+1]=i;
ok=0;
for (j=1;j<=k;j++)
if (A[j]==i)
ok=1;
if (ok==0)
bt(k+1);
}
}
}
int main()
{
f>>n;
bt(0);
f.close();
g.close();
return 0;
}