object Main extends App {
  val Array(n, m) = scala.io.StdIn.readLine().split(" ").map(_.toInt)
  val array = scala.io.StdIn.readLine().split(" ").map(_.toInt)
  val total = array.sum

  if (array.count(x => x >= total / (4 * m)) < m) {
    println("No")
  } else {
    println("Yes")
  }
}
