using System;

using System.Collections;

class StackDemo

{

    public static void Main()

    {

        //Create an instance of Stack

        Stack S = new Stack();

        //Add elements to the Stack using Push() Method

        S.Push("Prasad");

        S.Push("Giri");

        S.Push("Ravi");

        //Pop() removes and returns the object at the top of the Stack

        Console.WriteLine(S.Pop());

        //Count determines the number of elements contained in the Stack

        //Count will be 2 as we removed the top object from the Stack

        Console.WriteLine("Count = " + S.Count);

        //Peek() method returns the object at the top of the Stack without

        //removing from the Stack

        Console.WriteLine(S.Peek());

        //The count will still be 2 as the peek() method will not remove the object

        //from the Stack

        Console.WriteLine("Count = " + S.Count);

        //Remove all the items from the Stack using Clear() method

        S.Clear();

    }

}