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Cod sursa(job #557137)
#include<stdio.h>
int n, v[300], fol[300];
void back(int p){
int i;
if(p==n+1){
for(i=1; i<=n; i++)
printf("%d ", v[i]);
printf("\n");
}
else{
for(i=1; i<=n; i++)
if(!fol[i]){
fol[i]=1;
v[p]=i;
back(p+1);
fol[i]=0;
}
}
}
int main(){
freopen ("perm.in", "r", stdin);
freopen ("perm.out", "w", stdout);
scanf("%d ", &n);
back(1);
return 0;
}