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Cod sursa(job #659355)
#include <fstream>
using namespace std;
ifstream f ("permutari.in");
ofstream g ("permutari.out");
int n,sol[11];
void afis (int n)
{
for (int i=1; i<=n; i++)
g <<sol[i]<<' ';
g <<endl;
}
void backtr (int k)
{
int i,j;
bool ok;
if (k==n) afis (n);
else
{
for (i=1; i<=n; i++)
{
ok=true;
for (j=1; j<=k; j++)
if (sol[j]==i)
{
ok=false;
break;
}
if (ok)
{
sol[k+1]=i;
backtr (k+1);
}
}
}
}
int main ()
{
f >>n;
backtr (0);
return 0;
}