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Cod sursa(job #396074)
#include<fstream.h>
ifstream f("permutari.in");
ofstream g("permutari.out");
int n, k, x[9];
void tipar(int k){
for(int i=1;i<=k;i++)
g<<x[i]<<" ";
g<<'\n';
}
int cont(int k){
for(int i=1;i<k;i++)
if(x[k]==x[i]) return 0;
return 1;
}
void back(){
k=1;
x[k]=0;
while(k>0)
if(x[k]<n){
x[k]++;
if(cont(k))
if(k==n)
tipar(k);
else x[++k]=0;
}
else k--;
}
int main(){
f>>n;
back();
}