using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            link<int> a = new link<int> { };
            a.addFirst(new node<int>(1));
            a.add(1);
            a.add(2);
            a.add(3);
            a.add(4);
            a.add(1);
            a.print();
            a.removeAfter(????);
            a.print();
        }
    }
    class node<T>
    {
        public T data;
        public node<T> next;
        public node(T data)
        {
            this.data = data;
        }
    }
    class link<T>
    {
        node<T> firstNode;
        node<T> lastnode;
        public void add(T Node)
        {
                node<T> newnode = new node<T>(Node);
                newnode.next = this.lastnode.next;
                lastnode.next = newnode;

        }
        public void addFirst( node<T> newNode)
        {
            newNode.next = firstNode;
            firstNode = newNode;
        }
        public void removeAfter(node<T> node)
        {
            node.next = node.next.next;
        }
        public void removeBeggining(link<T> link)
        {
            if (link.firstNode.next != null)
            {
                link.firstNode = link.firstNode.next;
            }
        }
        public void print()
        {
            node<T> node = firstNode;
            while (node.next != null)
            {
                Console.WriteLine(node.data);
                if (node.next != null)
                {
                    node = node.next;
                }
            }
        }
    }
}