using System;

public class Program

{

    static char[] q = new char[5];

    static int size = 0;

    static int rear = -1;

    static int front = 0;

    public static void Main()

    {

        if (isEmpty())

        {

            Console.WriteLine("Queue is empty");

        }

        else

        {

            Console.WriteLine("Queue is not empty");

        }

        enQueue('Y');

        enQueue('M');

        Console.WriteLine(q);

        enQueue('T');

        Console.WriteLine(deQueue());

        Console.WriteLine(q);

        if (isFull())

        {

            Console.WriteLine("Queue is full");

        }

        else

        {

            Console.WriteLine("Queue is not full");

        }

        enQueue('G');

        enQueue('S');

        Console.WriteLine(q);

        Console.WriteLine(q.Length);

        Console.WriteLine(deQueue());

        if (isFull())

        {

            Console.WriteLine("Queue is full");

        }

        else

        {

            Console.WriteLine("Queue is not full");

        }

    }

    static void enQueue(char item)

    {

        rear++;

        if (rear>q.Length)

        {

            rear = rear-1;

        }

        else

        {

            q[rear] = item;

            size++;

        }

    }

    static char deQueue()

    {

        char letter = q[front];

        if (front==rear)

        {

            front=0;

        }

        else

        {

            front++;    

        }

        return letter;

    }

    static bool isEmpty()

    {

        if (rear==-1)

        {

            return true;

        }

        else

        {

            return false;

        }

    }

    static bool isFull()

    {

        if (size<5)

        {

            return false;

        }

        else

        {

            return true;

        }

    }

}