object Main extends App {
    val scanner = new java.util.Scanner(System.in)
    val n = scanner.next().toInt
    val d = scanner.next().toInt
    val x = scanner.next().toInt
    val as = for (_ <- 1 to n) yield scanner.next().toInt
    println(as.map(ai => 1 + (d-1) / ai).sum + x)
}
