Task16Lab4_2

import java.util.Scanner;

class Task16_4 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        double num = 1, sum = 0;
        int n  = sc.nextInt();
        sum = num;
        for (int i = 1; i <= n; i++) {
            num /= i;
            sum += num;
        }
        System.out.println(sum);
    }
}