using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var path = "/a/./b/../../c/d/../e/./f/";

        var pathParts = path.Split("/");

        var stack = new Stack<string>();

        for (var i = 0; i < pathParts.Length; i++)

        {

            if (string.IsNullOrWhiteSpace(pathParts[i]))

            {

                continue;

            }

            if (pathParts[i] == "..")

            {

                stack.Pop();

            }

            else if (pathParts[i] != ".")

            {

                stack.Push(pathParts[i]);

            }

        }

        var arr = stack.ToArray();

        Array.Reverse(arr);

        Console.WriteLine(stack.Count);

        foreach (var item in stack)

        {

            Console.WriteLine(item);    

        }

        Console.Write($"/{string.Join("/", arr)}");

    }

}