a,b,c = gets.chomp.split().map(&:to_i)
k = gets.chomp.to_i
count = 0
while(true)
    if (a < b) && (b < c)
        print 'Yes'
        break
    end
    if a >= b
        b = b*2
        count += 1
    elsif b >= c
        c = c*2
        count += 1
    end
    if count > k
        print 'No'
        break
    end
end

