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Cod sursa(job #631807)
#include<iostream>
#include<fstream>
using namespace std;
int sol[1000], n;
ifstream f("permutari.in");
ofstream g("permutari.out");
void afisare(){
for(int i=1;i<=n;i++)
g<<sol[i]<<" ";
g<<"\n";
}
bool valid (int p){
for(int i=1;i<p;i++)
if(sol[p]==sol[i])
return false;
return true;
}
void bkt(int p){
if(p-1==n){
afisare();
return;
}else
for(int i=1;i<=n;i++){
sol[p]=i;
if(valid(p))
bkt(p+1);
}
}
int main(){
f>>n;
bkt(1);
return 0;
}