arr = gets.chomp.split(' ').map(&:to_i)
k = gets.chomp.to_i
i = 0
while i < k
  if arr[0] > arr[1]
    arr[1] *= 2
  else
    arr[2] *= 2
  end
  i += 1
end
if arr[0] < arr[1] && arr[1] < arr[2]
  puts "Yes"
else
  puts "No"
end