#include <stdio.h>
unsigned Factorial(unsigned n){
if(n == 0){
return 1;
} else{
return n * Factorial(n - 1);
}
}
int main(void){
printf("3! %d\n", Factorial(3));
printf("5! %d\n", Factorial(5));
printf("8! %d\n", Factorial(8));
return 0;
}