Srabsko Unleashed

namespace SrabskoUnleashed
{
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Text.RegularExpressions;
    using System.Threading.Tasks;

    class Program
    {
        const string pattern = @"([a-zA-Z]+\s){1,3}@([a-zA-Z0-9]+\s){1,3}[0-9]+\s[0-9]+";

        static void Main()
        {
            Dictionary<string, List<Singer>> venues = new Dictionary<string, List<Singer>>();
            string input = Console.ReadLine();

            while (input != "End")
            {
                var matches = Regex.Matches(input, pattern);

                if (matches.Count > 0)
                {
                    string line = matches[0].Value;
                    string[] split = line.Split('@');
                    string name = split[0].Trim();
                    string[] secondSplit = split[1].Split(' ');
                    int ticketsCount = int.Parse(secondSplit.Last());
                    int ticketsPrice = int.Parse(secondSplit[secondSplit.Length - 2]);
                    string place = secondSplit[0];

                    for (int i = 1; i < secondSplit.Length - 2; i++)
                    {
                        place += " " + secondSplit[i];
                    }

                    Singer singer = new Singer(name, ticketsCount * ticketsPrice);

                    if (!venues.ContainsKey(place))
                    {
                        venues.Add(place, new List<Singer>());
                    }

                    if (venues[place].Contains(singer))
                    {
                        var contained = venues[place].First(s => s.Name == singer.Name);
                        contained.TotalMoney += singer.TotalMoney;
                    }
                    else
                    {
                        venues[place].Add(singer);
                    }
                }

                input = Console.ReadLine();
            }

            foreach (var pair in venues)
            {
                pair.Value.Sort();
                Console.WriteLine(pair.Key);

                foreach (var singer in pair.Value)
                {
                    Console.WriteLine("#  {0} -> {1}", singer.Name, singer.TotalMoney);
                }
            }
        }
    }

    class Singer : IComparable
    {
        public string Name { get; set; }

        public int TotalMoney { get; set; }

        public Singer(string name, int money)
        {
            this.Name = name;
            this.TotalMoney = money;
        }

        public int CompareTo(object obj)
        {
            return -(this.TotalMoney.CompareTo((obj as Singer).TotalMoney));
        }

        public override bool Equals(object obj)
        {
            return this.Name.Equals((obj as Singer).Name);
        }

        public override int GetHashCode()
        {
            return this.Name.GetHashCode();
        }
    }
}