object Main extends App {
  val n: Int  = scala.io.StdIn.readInt()
  val iterNum = 1.to(n).toList

  val fizzBuzzStr: String = iterNum
    .map {
      case i if i % 15 == 0 => "FizzBuzz"
      case i if i % 5 == 0  => "Buzz"
      case i if i % 3 == 0  => "Fizz"
      case i => i.toString
    }
    .fold("")((a, b) => a + b)

  val ans = fizzBuzzStr.filter(c => c == 'z').length

  println(ans)
}