class Kolejka
    {
        private int size;

        private int[] queue;

        public Kolejka(int size)
        {
            this.size = size;
            queue = new int[size];
        }

        private int head = 0;
        private int tail = 0;
        private int amount = 0;


        public void enqueue(int x)
        {
            if (amount < size)
            {
                queue[tail] = x;
                tail = (tail + 1) % size;
                amount++;
            }
            else
            {
                Console.WriteLine("Brak miejsca w kolejce!");
            }
        }

        public void dequeue()
        {
            if (amount > 0)
            {
                Console.WriteLine(queue[head]);
                head = (head + 1) % size;
                amount--;
            }
        }
        static void Main(string[] args)
        {
        }
    }