#include "pch.h"
#include <iostream>
using namespace std;

void Question3() {
	float n, p, result = 0, num;

	cout << "Enter a positive integer for n: ";
	cin >> n;

	if (n == 1) {
		cout << "1";
	}

	else {
		for (int i = 2; i <= n; i++) {
			num = (float)i;
			p = ((num - (float)1) / num);
			result = result + p;
			//cout << p << endl;
		}
		result = result + 1;
		cout << result;
	}
}

void Question4() {
	float p, num;

	cin >> num;

	p = (num - 2.0) / (num - 1.0) + (num - 1.0) / num;

	cout << p;
}

int main()
{
	Question3();
	//Question4();
}