fun main(args: Array<String>){
    val (n, m) = readLine()!!.split(" ").map { it.toInt() }
    val a = readLine()!!.split(" ").map { it.toInt() }

    val a1 = a.filter { it >= a.sum().div((4*m).toDouble())}
    if (a1.size < m){
        println("No")
    }else{
        println("Yes")
    }
}