object Main extends App {
  val Array(n, m) = scala.io.StdIn.readLine().split(" ").map(_.toInt)
  val array = scala.io.StdIn.readLine().split(" ").map(_.toInt)
  var total = array.sum
  var count = 0

  if (total % (4 * m) == 0) {
    count = array.count(x => x >= total / (4 * m))
  } else {
    count = array.count(x => x >= total / (4 * m) + 1)
  }

  if (count < m) {
    println("No")
  } else {
    println("Yes")
  }
}
