using System.Linq;

using System.Collections.Generic;

public class Program

{

    class CityPopulation {

        public string Country { get; set; }

        public string City { get; set; }

        public long Population { get; set; }

        public CityPopulation(string country, string city, long population) {

            Country = country;

            City = city;

            Population = population;

        }

    }

    public static void Main()

    {

        var list = new List<CityPopulation>();

        list.Add(new CityPopulation("China", "Shenzhen", 12_528_300));

        list.Add(new CityPopulation("China", "Shanghai", 24_183_300));

        list.Add(new CityPopulation("China", "Beijing", 21_707_000));

        list.Add(new CityPopulation("Nigeria", "Lagos", 16_060_303));

        list.Add(new CityPopulation("Pakistan", "Lahore", 11_126_000));

        list.Add(new CityPopulation("India", "Delhi", 11_034_555));

        list.Add(new CityPopulation("China", "Chongqing", 30_165_500));

        list.Add(new CityPopulation("Turkey", "Istanbul", 15_029_231));

        list.Add(new CityPopulation("Pakistan", "Karachi",  14_910_352));

        list.Add(new CityPopulation("China", "Guangzhou", 13_081_000));

        list.Add(new CityPopulation("India", "Mumbai", 12_442_373));

        list.Add(new CityPopulation("India", "Bangalore", 8_443_675));

        var ofCountry = ;

    }

}