Srubsko Unleashed

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
        Dictionary<string, Dictionary<string, int>> dict = new Dictionary<string, Dictionary<string, int>>();
        string pattern = @"^([A-Za-z]+\s*[A-Za-z]+\s*[A-Za-z]+)\s@([A-Za-z]+\s*[A-Za-z]+\s*[A-Za-z]+)\s([0-9]+)\s([0-9]+)$";
        string input = Console.ReadLine();
        while (input != "End")
        {
            Match match = Regex.Match(input, pattern);
            if (match.Success)
            {
                string singer = match.Groups[1].Value;
                string venue = match.Groups[2].Value;
                int ticketPrice = int.Parse(match.Groups[3].Value);
                int ticketCount = int.Parse(match.Groups[4].Value);

                if (!dict.ContainsKey(venue))
                {
                    dict.Add(venue, new Dictionary<string, int>());
                }
                if (!dict[venue].ContainsKey(singer))
                {
                    dict[venue].Add(singer, 0);
                }
                dict[venue][singer] += ticketPrice * ticketCount;
            }
            input = Console.ReadLine();
        }
        foreach (var item in dict)
        {
            Console.WriteLine(item.Key);
            foreach (var singer in item.Value.OrderByDescending(a => a.Value))
            {
                Console.WriteLine($"#  {singer.Key} -> {singer.Value}");
            }
        }

    }// end clause
}