Files

using System;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;

namespace Files
{
    public class Files
    {
        public static void Main()
        {
            var lines = int.Parse(Console.ReadLine());

            var result = new Dictionary<string, Dictionary<string, BigInteger>>();

            for (int i = 0; i < lines; i++)
            {
                var currentFile = Console.ReadLine().Split('\\', ';').ToArray();

                var root = currentFile[0];
                var file = currentFile[currentFile.Length - 2];
                var fileSize = currentFile.Last();

                if (!result.ContainsKey(root))
                {
                    result[root] = new Dictionary<string, BigInteger>();
                }
                if (!result[root].ContainsKey(file))
                {
                    result[root][file] = BigInteger.Parse(fileSize);

                }
                if (result[root].ContainsKey(file))
                {
                    result[root][file] = BigInteger.Parse(fileSize);

                }
            }

            var condition = Console.ReadLine().Split();

            var directory = condition.Last();
            var searchExtension = condition[0];

            var extension = string.Empty;
            var directoryCounter = 0;
            var count = 0;

            foreach (var root in result.Where(x => x.Key == directory))
            {
                foreach (var fail in root.Value.OrderByDescending(x => x.Value).ThenBy(x => x.Key))
                {
                    directoryCounter++;

                    var fileWithExt = fail.Key.Split('.').ToArray();

                    extension = fileWithExt.Last();

                    if (searchExtension == extension)
                    {
                        Console.WriteLine($"{fail.Key} - {fail.Value} KB");
                    }
                    else
                    {
                        count++;
                    }
                }
            }

            if (count==directoryCounter)
            {
                Console.WriteLine("No");
            }
        }
    }
}