population counter

using System;
using System.Collections.Generic;
using System.Linq;

namespace _7._Population_Counter
{
    class Program
    {
        static void Main(string[] args)
        {
            Dictionary<string, SortedDictionary<string, long>> totalPopulationInCountry = new Dictionary<string, SortedDictionary<string, long>>();
            string input;
            while ((input=Console.ReadLine())!="report")
            {

                string[] splitedInput = input?.Split(new []{'|'},StringSplitOptions.RemoveEmptyEntries).ToArray();

                string city = splitedInput[0];
                string country = splitedInput[1];
                long populationInCity = long.Parse(splitedInput[2]);



                if (!totalPopulationInCountry.ContainsKey(country))
                {
                    totalPopulationInCountry.Add(country, new SortedDictionary<string, long>());
                }
                if (!totalPopulationInCountry[country].ContainsKey(city))
                {
                    totalPopulationInCountry[country].Add(city, 0);
                }
                totalPopulationInCountry[country][city] = populationInCity;
            }


            foreach (var item in totalPopulationInCountry.OrderByDescending(x => x.Value.Values.Sum()))
            {
                Console.WriteLine($"{item.Key} (total population: {item.Value.Values.Sum()})");
                foreach (var cities in item.Value.OrderByDescending(c => c.Value))
                {
                    Console.WriteLine($"=>{cities.Key}: {cities.Value}");
                }
            }
        }
    }
}