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Cod sursa(job #342359)
#include <fstream.h>
#define NMAX 9
int N,X[NMAX],viz[NMAX];
ifstream fin("permutari.in");
ofstream fout("permutari.out");
void afisare()
{int i;
for(i=1;i<=N;i++)
fout<<X[i]<<" ";
fout<<"\n";
}
void back(int k)
{int i;
if (k==N+1) afisare();
else for(i=1;i<=N;i++)
if (viz[i]==0) {X[k]=i;
viz[i]=1;
back(k+1);
viz[i]=0;
}
}
int main()
{
fin>>N;
back(1);
fout.close();
fin.close();
return 0;
}