import java.util.Scanner

object Main extends App {
  val sc=new java.util.Scanner(System.in)
  val n,m = sc.nextInt()
  val A = (0 until n) map (_ => sc.nextInt())
  
  def solve(n : Int, m : Int, A : Seq[Int]) : String = {
    val popular = A.sum.toDouble / 4.0 / m
    if(A.count(s => s >= popular) >= m) "Yes"
    else "No"
  }

  println(solve(n,m,A))
}