object Main {
  import scala.io.StdIn._
  def main(args: Array[String]): Unit = {
    def readInts() = readLine().split(' ').map(_.toInt)
    val Array(n, m, _*) = readInts()
    val votesOfItems = readInts()
    val total = votesOfItems.sum
    def isOk(votes: Int): Boolean = votes * 4 * m >= total
    println(if(votesOfItems.count(isOk) >= m) "Yes" else "No")
  }
}
