#include<stdio.h>

/*
 * This is not fibonacci numbers
 * This is factorial
 * It is NOT fibonacci numbers
 * Those are on lab 14
 * Should have been int fact(int x) intead
 */
int fib(int x){
	if(x < 2)
		return 1;
	return fib(x-1) * x;
}

int main(){
	printf("%d\n", fib(30));

	return 0;
}