Сръбско Unleashed

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Numerics;

namespace ConsoleApp14
{
    class Program
    {
        static void Main(string[] args)
        {

            var cities = new Dictionary<string, Dictionary<string, int>>();

            while (true)
            {
                string input = Console.ReadLine();
                if (input=="End")
                {
                    break;
                }
                string[] inputToArray = input.Split('@').ToArray();
                if (inputToArray.Length == 2)
                {
                    //artist name
                    string[] artistToArray = inputToArray[0].Split(new char[] {' '}, StringSplitOptions.RemoveEmptyEntries).ToArray();
                    string artist = string.Empty;
                    if (artistToArray.Length <= 3)
                    {
                        artist = string.Join(" ", artistToArray);
                    }
                    else
                    {
                        continue;
                    }

                    //sumPrice
                    List<string> cityAndPrice = inputToArray[1].Split().ToList();
                    if (cityAndPrice.Count<3)
                    {
                        continue;
                    }
                    int ticketsCount = int.Parse(cityAndPrice[cityAndPrice.Count - 1]);
                    cityAndPrice.RemoveAt(cityAndPrice.Count-1);
                    int ticketsPrice = int.Parse(cityAndPrice[cityAndPrice.Count - 1]);
                    cityAndPrice.RemoveAt(cityAndPrice.Count - 1);
                    int sum = ticketsCount * ticketsPrice;

                    //city name
                    string city = string.Empty;
                    if (cityAndPrice.Count<=3)
                    {
                        city = string.Join(" ", cityAndPrice);
                    }
                    else
                    {
                        continue;
                    }

                    //add in the dictionary
                    if (!cities.ContainsKey(city))
                    {
                        cities.Add(city, new Dictionary<string, int>());
                    }
                    if (!cities[city].ContainsKey(artist))
                    {
                        cities[city].Add(artist, 0);
                    }
                    cities[city][artist] += sum;
                }
            }

            foreach (var key in cities.Keys)
            {
                Console.WriteLine("{0}", key);
                foreach (var pair in cities[key].OrderByDescending(x=>x.Value))
                {
                    Console.WriteLine("#  {0} -> {1}", pair.Key, pair.Value);
                }
            }

        }
    }
}