A,B,C = gets.chomp.split.map &:to_i
K = gets.chomp.to_i
clr_flg = false

while K != -1
  if A >= B
    B *= 2
  elsif B >= C
    C *= 2
  else
    K = 0
    clr_flg = true
  end
  K -= 1
end 

if clr_flg
  print "Yes" 
else
  print "No"
end

