import scala.io.StdIn

object Main extends App {
  val n = StdIn.readLine().trim.toInt
  val Array(d, x) = StdIn.readLine().trim.split(" ").map(_.toInt)

  def loop(Ai: Int, a: Int = -1, cnt: Int = -1): Int = if( a*Ai + 1 > d){
    cnt
  } else {
    loop(Ai, a + 1, cnt + 1)
  }
  
  val result = (0 until n).foldLeft(x){ (acc, i) =>
    acc + loop(StdIn.readLine().trim.toInt)
  }

  println(result)
}