lines = readlines(chomp: true).map{|line| line.split(' ')}

a = lines[0][0].to_i
b = lines[0][1].to_i
c = lines[0][2].to_i
k = lines[1][0].to_i

k.times do
	if c <= b then
		c = c * 2
	elsif b <= a
		b = b * 2
	end
end

if c > b && b > a
	print "Yes"
else
	print "No"
end
