fun main(args: Array<String>) {
    val inputLine = readLine()!!.split(" ").map(String::toInt)
    val numN = inputLine[0]
    val numM = inputLine[1]

    val aList = readLine()!!.split(" ").map(String::toInt).toMutableList()

    aList.sortDescending()
    val sumA = aList.sum()
    val aSize = aList.filter{it >= sumA / (numM * 4).toDouble()}.size

    val result = if(aSize >= numM) "Yes" else "No"
    println(result)

}