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

    val sum = elemens.reduce{e1, e2 -> e1 + e2}

    val limit = sum / (4 * m)
    val canChoose = elemens.filter{ it >= limit }
    if(canChoose.size >= m){
        println("Yes")
        return
    }
    println("No")
}