object Main {
  def main(args: Array[String]): Unit = {
    val n = scala.io.StdIn.readInt
    val a = scala.io.StdIn.readLine.split(" ").map(_.toLong)

    var ans = 0

    for (x <- a) {
      var tp = x

      while (tp % 2 == 0) {
        ans += 1
        tp = tp / 2
      }
    }
    println(ans)
  }
}
