import Foundation
func toTuple<T>(_ args: [T]) -> (T, T) { (args[0], args[1]) }
func readInts() -> [Int] { readLine()!.split(separator: " ").map { Int($0)! } }

let n = Int(readLine()!)!
let (d, x) = toTuple(readInts())
var ans = 0
for _ in 0..<n {
  let a = Int(readLine()!)!
  var t = 1
  while t <= d {
    t += a
    ans += 1
  }
}
print(ans + x)