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Cod sursa(job #613949)
#include <iostream>
#include <fstream>
using namespace std;
int n,sol[100];
ofstream fout("permutari.out");
void tiparire()
{
for(int i=1;i<=n;i++)
fout<<sol[i]<<" ";
fout<<'\n';
}
int verif(int nr,int k)
{
for (int i=1;i<k;i++)
if(sol[i]==nr) return 0;
return 1;
}
void bk(int k)
{
if(k>n) tiparire();
else
for(int i=1;i<=n;i++)
if(verif(i,k))
{
sol[k]=i;
bk(k+1);
}
}
int main ()
{
ifstream fin("permutari.in");
fin>>n;
bk(1);
return 0;
}