5.4.8

#include <iostream>
#include <iomanip>
#include <algorithm>
#include <cmath>

using namespace std;
double eps = 1e-9;
double f(double x) {
    double s, a, c = x;
    int i = 1, z = 1;
    s = 1;
    i = 1;
    a = 1;
    while (a >= eps) {
        z = (2 * i) * (2 * i + 2);
        c *= x;
        a = c / z;
        s += a;
        i++;
    }
    return s;
}

int main()
{
    double h;
    int i;
    cin >> h;

    for (double i = 0.2; i <= 0.6 + eps; i += h) {
        cout << i << " " << f(i) << endl;
    }
}