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Cod sursa(job #520404)
#include<stdio.h>
int n, v[10], u[10];
void back(int poz){
int i;
if(poz==n+1){
for(i=1; i<=n; i++)
printf("%d ", v[i]);
printf("\n");
}
else{
for(i=1; i<=n; i++){
if(u[i]==0){
v[poz]=i;
u[i]=1;
back(poz+1);
u[i]=0;
}
}
}
}
int main(){
freopen ("permutari.in", "r", stdin);
freopen ("permutari.out", "w", stdout);
scanf("%d ", &n);
back(1);
}