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Cod sursa(job #900047)
#include<stdio.h>
using namespace std;
int x[10],n;
int sol(int k){
if(k==n)
return 1;
return 0;
}
int cont(int k){
for(int i=1;i<k;i++)
if(x[i]==x[k])
return 0;
return 1;
}
void afis(int k){
for(int i=1;i<=k;i++)
printf("%d ",x[i]);
printf("\n");
}
void bkt(){
int k=1;
x[k]=0;
while(k>0)
if(x[k]<n){
x[k]++;
if(cont(k))
if(sol(k))
afis(k);
else{
k++;x[k]=0;}
}
else
k--;
}
int main (){
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d",&n);
bkt();
return 0;
}