import java.util.Scanner

object Main {
  def main(args: Array[String]): Unit = {
    val sc = new Scanner(System.in)
    val n, m = sc.nextInt()
    val a = List.fill(n)(sc.nextInt())
    val count = a.count(c => c >= a.sum * 1.0 / (4 * m))
    if (count >= m) println("Yes") else println("No")
  }
}