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

a, b, c = A, B, C

K.times do
  if a >= b
    b *= 2
    next
  elsif b >= c
    c *= 2
    next
  else
    break
  end
end

if a < b && b < c
  puts 'Yes'
else
  puts 'No'
end
