# frozen_string_literal: true

def solve
  d = (A - C)**2 - 2 * (B - D)
  if d < 0
    'No'
  elsif d.zero?
    'Yes'
  else
    [(A + C) / 2.0, (B + D) / 2.0].join(' ')
  end
end

A, B, C, D = gets.split.map(&:to_i)

puts solve