Files

namespace Files
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.IO;

    public class Files
    {
        public static void Main(string[] args)
        {
            int fileCount = int.Parse(Console.ReadLine());

            List<string> files = ReadFiles(fileCount);

            string[] queryParams = Console.ReadLine().Split();

            PrintResult(ExecuteQuery(files, queryParams[0], queryParams[2]));
        }

        private static void PrintResult(Dictionary<string, int> filteredFiles)
        {
            if (filteredFiles.Count == 0)
            {
                Console.WriteLine("No");
                return;
            }

            foreach (KeyValuePair<string, int> file in filteredFiles)
            {
                Console.WriteLine($"{file.Key} - {file.Value} KB");
            }
        }

        private static Dictionary<string,int> ExecuteQuery(List<string> files, string extension, string rootFolder)
        {
            Dictionary<string, int> filteredFiles = files
                        .Where(file => file.Split(new [] {'\\'}, StringSplitOptions.RemoveEmptyEntries)[0] == rootFolder)
                        .Where(file =>
                        {
                            string ext = Path.GetExtension(file
                                .Split(new[] {'\\'}, StringSplitOptions.RemoveEmptyEntries)
                                .Last()
                                .Split(';')[0]);

                            return !string.IsNullOrEmpty(ext) && ext.Substring(1) == extension;
                        })
                        .ToLookup(file => file
                            .Split(new[] { '\\' }, StringSplitOptions.RemoveEmptyEntries)
                            .Last()
                            .Split(';')[0],
                            file => int.Parse(file
                            .Split(new[] { '\\' }, StringSplitOptions.RemoveEmptyEntries)
                            .Last()
                            .Split(';')[1]))
                        .ToDictionary(pair => pair.Key, pair => pair.Last())
                        .OrderByDescending(file => file.Value)
                        .ThenBy(file => file.Key)
                        .ToDictionary(pair => pair.Key, pair => pair.Value);

            return filteredFiles;
        }

        private static List<string> ReadFiles(int fileCount)
        {
            List<string> files = new List<string>();

            for (int i = 0; i < fileCount; i++)
            {
                files.Add(Console.ReadLine());
            }

            return files;
        }
    }
}