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Cod sursa(job #662940)
#include <cstdio>
using namespace std;
freopen ("permutari.in","r",stdin);
freopen ("permutari.out","w",stdout);
int n,sol[11],b[11];
bool ok;
void afis ()
{
for (int i=1; i<=n; i++)
printf ("%d ",sol[i]);
printf ("\n");
}
void backtr (int k)
{
int i,j;
bool ok;
if (k>n) afis();
else
for(i=1;i<=n;i++)
{
ok=true;
for (int j=1;j<k;j++)
if(sol[j]==i) ok=false;
if (ok==true)
{
sol[k]=i;
backtr(k+1);
}
}
}
int main ()
{
scanf ("%d",&n);
backtr (1);
return 0;
}