#define _USE_MATH_DEFINES
#include <cmath>
#include <iostream>
#include <algorithm>
using namespace std;

double func(double a, double b, double c, double x)
{
    double f;
    if(x<0 && b!=0)
    {
        f = -(2*x - c)/(c*x - a);
    }
    else
    {
        if(x>0 && b==0)
        {
            f = (x - a) / (x - c);
        }
        else
        {
            f = -x/c + -c/(2*x);
        }
    }
    int ac = (int) a;
    int bc = (int) c;
    int cc = (int) c;
    if ((~(ac | bc)) & (~(ac | cc)))
        return f;
    else
        return (int) f;
}

int main()
{
    double a, b, c, xStart, xEnd, xDelta;
    cin>>a>>b>>c>>xStart>>xEnd>>xDelta;
    for(double i=xStart; i<=xEnd; i+=xDelta)
    {
	    double res = func(a, b, c, i);
	    cout<<"f("<<i<<")="<<res<<"\n";
    }
	return 0;
}