using System.Collections.Generic;
public static void Main()
Stack<int> stack1 = new Stack<int>();
stack1.Push(11); stack1.Push(22); stack1.Push(33);
Console.Write("{0}", stack1.Pop());
Stack<string> stack2 = new Stack<string>();
stack2.Push("가"); stack2.Push("나"); stack2.Push("다");
Console.Write("{0}", stack2.Pop());