object Main {
  def main(args : Array[String]) {
    val NM = readLine().split(' ').map(_.toInt)
    var A = readLine().split(' ').map(_.toInt)
    A = A.sorted.reverse
    
	if((A.sum / (4 * NM(1))) <= A(NM(1) - 1)) println("Yes")
    else println("No")
  }
}
