let a, b, c = Scanf.sscanf (read_line()) "%d %d %d" (fun a b c -> a,b,c)
let k = read_int ()

let rec loop red green blue i =
  if blue > green && green > red then "Yes" else 
  if i >= k then "No" else (
    if red >= green then (loop red (green*2) blue (i+1)) else
    loop red green (blue*2) (i+1)
  )

let () = print_endline @@ loop a b c 0
