fun main(args: Array<String>) {
    val (n, k) = readLine()!!.split(" ").map(String::toInt)
    val v = Array<Int>(n+1, {0})
    for (i in 2..n) {
        if (v[i] > 0) continue
        for (j in i..n step i){
            v[j]++
        }
    }
    println(v.filter{it >= k}.size)
}