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Cod sursa(job #657586)
#include<fstream>
using namespace std;
ifstream cin("permutari.in");
ofstream cout("permutari.out");
int i, n, st[9], p;
void afisare(int p)
{
int i;
for(i=1;i<=p;i++)
cout<<st[i]<<" ";
cout<<"\n";
}
int valid(int p)
{int i;
for(i=1;i<p;i++)
if(st[p]==st[i]) return 0;
return 1;
}
void back(int p)
{
int pval;
for(pval=1;pval<=n;pval++)
{st[p]=pval;
if(valid(p))
if(p==n)
afisare(p);
else
back(p+1);}
}
int main()
{
cin>>n;
back(1);
return 0;
}