using System;

using System.Collections;                   

public class Program

{

    public static void Main()

    {

        Queue q=new Queue();

        q.Enqueue(10);

        q.Enqueue(20);

        q.Enqueue(30);

        q.Enqueue(40);

        q.Enqueue(50);

        q.Enqueue(60);

        q.Enqueue(70);

        q.Enqueue(80);

        q.Enqueue(90);

        q.Enqueue(100);

        q.Enqueue(1);

        q.Enqueue(12);

        Console.WriteLine("Elements in queue");

        foreach(int i in q)

        {

            Console.WriteLine(i);

        }

        Console.WriteLine("Count {0}",q.Count);

        Console.WriteLine("top {0}",q.Peek());

        q.Dequeue();

        Console.WriteLine("Top {0}",q.Peek());

        q.Dequeue();

        Console.WriteLine("Top {0}",q.Peek());

        Console.WriteLine("27 {0}",q.Contains(27));

        Console.WriteLine("30 {0}",q.Contains(30));

        Console.WriteLine("Elements in queue after some operations:");

        foreach(int i in q)

        {

            Console.WriteLine(i);

        }

        Object[] a=q.ToArray();

        Console.WriteLine("queue to array");

        foreach(Object i in a)

        {

            Console.WriteLine(i);

        }

    }

}