#include <stdio.h>
#include <math.h>

int kertoma(int k)
{
	int kert = 1;
	if (k == 0 || k == 1)
	return 1;

	int i;
	for (i = 2; i <= k; i++)
	kert = kert * i;
	return kert;
}
int main()
{
	double neper = 0;
	int j;
	for (j = 0; j <= 6; j++)
	neper = neper + 1.0/kertoma(j);

	printf("nepsku on %f \n", neper);
	printf("oikea nepsku on %f \n", M_E);

	return 0;
}