fun main(args: Array<String>) {
    val ( n, m) = readLine()!!.split(" ").map{it.toInt()}
    var cnt = 0
    var sum = 0.0
    var a = readLine()!!.split(" ").map{it.toInt()}
    for (i in 1..n) {
        sum += a[i-1]
    }
    for (i in 1..n) {
        if(a[i-1] >= sum/4/m) cnt++
    }
    if(cnt >= m) println("Yes")
    else println("No")
}