def f(x)
  return 1.-x*x
end
l=Float(-3)
r=Float(2)
eps=Float(0.0000001)

while ((r-l)>eps)
  m1=l+(r-l)/3
  m2=r-(r-l)/3
  if (f(m1) < f(m2))    
    l=m1        
  elsif (f(m1) > f(m2)) 
    r=m2
  else
    l=m1
    r=m2
  end
end
puts   (l+r)/2
puts f((l+r)/2)