#include <iostream>
#include <cstdlib>
#include <limits>   //for numeric_limits
#include <cmath>    //for pow
using namespace std;

int main()
{
	const double radix = numeric_limits<double>::radix;

	double m = (1.0 - pow(radix, -numeric_limits<double>::digits))
		* pow(radix, numeric_limits<double>::max_exponent - 1);

	m *= radix;

	if (m == numeric_limits<double>::max()) {
		cout << fixed << m << "\n";   //fixed prevents rounding
	}

	return EXIT_SUCCESS;
}