using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        // 5 -> 1 -> 7 -> 2 -> 6

        var list = 

            new ListNode(5, 

                new ListNode(1,

                    new ListNode(7,

                        new ListNode(2, 

                            new ListNode(6)))));

        // TODO: Find the middle element of the linked list

    }

}

​

public class ListNode

{

    public ListNode(int val, ListNode next = null)

    {

        this.Value = val;

        this.Next = next;

    }

    public int Value { get; set; }

    public ListNode Next { get; set; }

}

​

​