fun main(args: Array<String>) {
    val (N, M) = readLine()!!.split(" ").map(String::toInt)
    val A = readLine()!!.split(" ").map(String::toDouble)
    val border = A.sum() / (4.0 * M)
    val cand = A.filter { it >= border }
    println(if (cand.size >= M) "Yes" else "No")
}