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Cod sursa(job #918762)
#include <fstream>
#include <iostream>
using namespace std;
ifstream in("permutari.in");
ofstream out("permutari.out");
int n,s[20];
void scrie(){
for(int i=1;i<=n;i++)
out<<s[i]<<"";
out<<endl;}
int valid(int k){
for(int i=1;i<k;i++)
if(s[i]==s[k])return 0;
return 1;}
void init(int k){
s[k]=0;}
void bkt(int k){
if(k==n+1)
scrie();
else{
init(k);
while(s[k]<n){
s[k]++;
if(valid(k))
bkt(k+1);}
}
}
int main(){
in>>n;
bkt(1);
}