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Cod sursa(job #990890)
#include <fstream>
using namespace std;
ifstream f("permutari.in");
ofstream g("permutari.out");
int n, v[10], a[10];
void back(int k){
if(k==n+1)
{
for(int i=1; i<=n; i++)
g<<a[i]<<' ';
g<<"\n";
}
else
{
for(int i=1; i<=n; i++)
if(v[i]==0)
{
v[i]=1;
a[k]=i;
back(k+1);
v[i]=0;
}
}
}
int main(){
f>>n;
back(1);
return 0;
}