Night Life

/* You'll receive the input from the console. There will be an arbitrary number of lines until you receive the string "END". Each line will contain data in format: "city;venue;performer". If either city, venue or performer don't exist yet in the database, add them. If either the city and/or venue already exist, update their info.
 * Cities should remain in the order in which they were added, venues should be sorted alphabetically and performers should be unique (per venue) and also sorted alphabetically.
 * Print the data by listing the cities and for each city its venues (on a new line starting with "->") and performers (separated by comma and space). */

namespace _08.NightLife
{
    using System;
    using System.Collections.Generic;

    class NightLife
    {
        static void Main(string[] args)
        {
            var dataList = new Dictionary<string, SortedDictionary<string, SortedSet<string>>>();

            string inputLine = Console.ReadLine().Trim();
            while (inputLine != "END")
            {
                string[] temp = inputLine.Split(';');
                string city = temp[0].Trim();
                string venue = temp[1].Trim();
                string performer = temp[2].Trim();
                if (!dataList.ContainsKey(city))
                {
                    dataList[city] = new SortedDictionary<string, SortedSet<string>>();
                }

                if (!dataList[city].ContainsKey(venue))
                {
                    dataList[city][venue] = new SortedSet<string>();
                }

                dataList[city][venue].Add(performer);

                inputLine = Console.ReadLine().Trim();
            }

            PrintResults(dataList);
        }

        private static void PrintResults(Dictionary<string, SortedDictionary<string, SortedSet<string>>> dataList)
        {
            foreach (var entry in dataList)
            {
                Console.WriteLine(entry.Key);
                foreach (var pair in entry.Value)
                {
                    Console.WriteLine("->{0}: {1}", pair.Key, string.Join(", ", pair.Value));
                }
            }
        }
    }
}