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Cod sursa(job #217744)
#include<stdio.h>
int st[9],n,i,k;
void init(){
st[k]=0;
}
int succesor(){
if(st[k]<n){
st[k]++;
return 1;
}
return 0;
}
int valid(){
for(i=1;i<=k-1;++i)
if(st[k]==st[i])
return 0;
return 1;
}
int solutie(){
return (k==n);
}
void tipar(){
for(i=1;i<=n;++i)
printf("%d ",st[i]);
printf("\n");
}
void bkt(){
int as;
k=1;
init();
while(k>0){
do{}while((as=succesor())&&!valid());
if(as)
if(solutie())
tipar();
else{
k++;
init();
}
else k--;
}
}
int main(){
freopen("permutari.in","r",stdin);
freopen("permutari.out","w",stdout);
scanf("%d",&n);
bkt();
fclose(stdin);
fclose(stdout);
return 0;
}