var max:Int!
var data:[Any] = []

init(_ max:Int) {
    self.max = max
}

func enqueue(_ obj:Any) -> Bool {
    if data.count > self.max - 1 {
        return false
    }
    data.append(obj)
    return true
}

func dequeue() -> Any? {
    if data.count > 0 {
        let obj = data[0]
        data.remove(at: 0)
        return obj
    }
    return nil
}