#include<iostream>

using namespace std;

void main()
{
	float x;
	cout << "Number?";
	cin >> x;

	float s = 2;
	float r = (x/s + s)/2;

	while(abs(r-s) >= .001)
	{
		s = r;
		r = (x/s + s)/2;
	}
	cout << "The answer is " << r << endl;
}