팩토리얼

#include <stdio.h>

int main()
{
	int a;

	scanf("%d", &a);
	printf("%d", factorial(a));
	
	return 0;
}
int factorial(int n)
{
	int i, result;
	result = 1;

	for (i = 1; i <= n; i++)
	{
		result = result * i;
	}
	return result;
}