import scala.io.StdIn._

object Main extends App {

  val Array(a,b,c) = readLine().split(" ").map(_.toInt)
  val k = readInt()

  def solve() = {
    var(bb, cc) = (b,c)
    var mp = k
    while(mp > 0 && a >= bb) {
      mp -= 1
      bb *= 2
    }
    while(mp > 0 && bb >= cc) {
      mp -= 1
      cc *= 2
    }
    if(cc > bb && bb > a) "Yes" else "No"
  }


  println(solve())

}

