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

	int eh_primo (int y)
	{
	int i = 2, p = 0;
	while (y > i){
		if (y%i == 0){
			p = p + 1;
		}
		i++;
	}
	proximo_primo(p, y);
}

	int proximo_primo (int p, int y)
	{
		if(p == 0){
			return y;
		}
		else{
			y = y + 1;
			eh_primo(y);
		}
	}

	double fatorial (int z, int i)
	{
		double fat = 1, total;
		while(z > 1){
			fat = fat * z;
			z--;
		}
		fat = fat/i;
		return fat;
}

	int main ()
	{
		int n, i = 1, y;
		double t = 0, v = 0;
		scanf("%d", &n);
		while(n >= i){
			y = (n+i) - n;
			printf("%d!/%d", i, eh_primo (y));
			if(n > i){
				printf(" + ");
			}
			t = fatorial(i, eh_primo (y));
			v = v + t;
			if(n == i){
			printf("\n");
		}
		i++;
	}
	printf("%.2lf\n", v);
	return 0;
}