07. Population Counter

namespace _07.PopulationCounter
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    public class PeopleInCountries
    {
        public static void Main()
        {
            var tokens = Console.ReadLine().Split('|');
            var countries = new Dictionary<string, Dictionary<string, long>>();

            while (tokens[0] != "report")
            {
                var countryName = tokens[1];

                if (!countries.ContainsKey(countryName))
                {
                    countries[countryName] = new Dictionary<string, long>();
                }

                var cityName = tokens[0];
                var population = long.Parse(tokens[2]);

                countries[countryName][cityName] = population;

                tokens = Console.ReadLine().Split('|');
            }

            countries.OrderByDescending(x => x.Value.Select(y => y.Value).Sum()).ToDictionary(p => p.Key, p.key);
        }
    }
}