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Cod sursa(job #394132)
#include<iostream.h>
#include<fstream.h>
int main()
{
int i,n,k=1,v[10],ok;
ifstream fin("permutari.in");
ofstream fout("permutari.out");
fin>>n;
v[1]=0;
while(k>0){
ok=1;
if(v[k]<n){
v[k]++;
for(i=1;i<k && ok;i++)if(v[i]==v[k])ok=0;
if(ok)if(k==n){
for(i=1;i<=n;i++)fout<<v[i]<<' ';
fout<<'\n';
}
else{
k++;
v[k]=0;
}
}
else k--;
}
return 0;
}