object Main extends App {
  val sc = new java.util.Scanner(System.in)
  var a = Array.fill(3)(sc.nextInt())
  var k = sc.nextInt()
  for (i <- 0 until k){
    if (a(0) >= a(1)){
      a(1)*=2
    }else if(a(1) >= a(2)){
      a(2)*=2
    }else{
      a(2)*=2
    }
  }
  println(if(a(0)<a(1) & a(1) < a(2)) "Yes" else "No")
}
