static void Main(string[] args)
{
Moscow firstCity = new Moscow(10000000);
Minsk secondCity = new Minsk(2000000);
Kiev thirdCity = new Kiev(2800000);
Console.WriteLine("The largest population is in {0} {1} people", city, population);
}
static void Main(string[] args)
{
London l = new London();
Moscow m = new Moscow();
Berlin b = new Berlin();
Console.WriteLine(l > b);
Console.WriteLine(m == l);
}