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Cod sursa(job #613025)
#include<fstream>
using namespace std;
int n,x[10];
ifstream f("permutari.in");
ofstream g("permutari.out");
int ver(int k)
{
for(int i=1;i<k;i++)
if(x[i]==x[k])
return 0;
return 1;
}
void back (int k)
{
if(k>n)
{
for(int i=1;i<=n;i++)
g<<x[i]<<" ";
g<<"\n";
return ;
}
for(int i=1;i<=n;i++)
{
x[k]=i;
if(ver(k))
back(k+1);
}
}
int main (){
f>>n;
back(1);
return 0;
}