object Main extends App{
    val sc=new java.util.Scanner(System.in)
    val n=sc.nextInt
    val m=sc.nextInt
    val A=List.fill(n)(sc.nextInt)
    val pre=A.map(i=>i<A.sum/(4*m)).count(_)
    val res=if(pre<m)'Yes' else 'No'
    println(res)

}