
object Main extends App {
  val sc = new java.util.Scanner(System.in) 
  val n = sc.nextInt()
  val d = sc.nextInt()
  val x = sc.nextInt()  
  val ret = for (i <- 1 to n) yield {
    calc(0, sc.nextInt(), List()).length
  }
  println(ret.sum + x)
  
  def calc(i: Int, a: Int, acc: List[Int]): List[Int] = {
    if (!acc.isEmpty && d < i*a+1) {
      acc
    } else {
      calc(i+1, a, acc:+(i*a+1))
    }
  }
}
