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Cod sursa(job #999810)
#include<fstream>
using namespace std;
ofstream outFile;
bool valid(int k);
void print();
void generare(int k);
int stiva[9];
int n;
int main(){
ifstream inFile("permutari.in");
inFile>>n;
outFile.open("permutari.out");
generare(1);
outFile.close();
}
bool valid(int k){
bool t=true;
for(int i=1;i<k;i++) if(stiva[k]==stiva[i]) t=false;
return t;
}
void print(){
for(int i=1;i<=n;i++) outFile<<stiva[i]<<" ";
outFile<<"\n";
}
void generare(int k){
if(k==n+1) print();
else for(int i=1;i<=n;i++){
stiva[k]=i;
if(valid(k)) generare(k+1);
}
}