using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static IList<IList<string>> FindDuplicate(string[] paths) {

        var contentMap = new Dictionary<string, IList<string>>();

​

        foreach (string path in paths)

        {

            string[] splitted = path.Split(new[] {' '}, StringSplitOptions.RemoveEmptyEntries);

            string folder = splitted[0] + '/';

​

            for (int i = 1; i < splitted.Length; i++)

            {

                string file = splitted[i];

                int start = file.IndexOf('(');

                string content = file.Substring(start, file.Length - start);

​

                if (!contentMap.ContainsKey(content))

                    contentMap[content] = new List<string>();

                contentMap[content].Add($"{folder}{file.Substring(0, start)}");

            }

        }

​

        return contentMap.Any() ? contentMap.Values.Where(l => l.Count > 1).ToList() : new List<IList<string>>();

    }

    public static void ShowList(IList<IList<string>> lists)

    {

        Console.WriteLine("\nOutput:");

        foreach (var list in lists)

        {

            Console.WriteLine($"[{string.Join(", ", list)}]");

        }

    }

    public static void Main()

    {

        Console.WriteLine("UniLecs");

        // tests

        ShowList(FindDuplicate(new string[] {

            "root/a 1.txt(abcd) 2.txt(efgh)",

            "root/c 3.txt(abcd)",

            "root/c/d 4.txt(efgh)",

            "root 4.txt(efgh)"

        }));

        ShowList(FindDuplicate(new string[] {

            "root/a 1.txt(abcd) 2.txt(efgh)",

            "root/c 3.txt(abcd)",

            "root/c/d 4.txt(efgh)"

        }));

    }

}