URI 1155 Solution

#include <iostream>

#include<iomanip>

using namespace std;

int main()

{

    double S = 0.0;

    for(int i = 1; i <= 100; i++)

    {

        S += 1/(double)i;

    }

   cout<<setprecision(3)<<S<<endl;

    return 0;

}