static void Main(string[] args)
{
int numberCities = 1000000;
Simulator sim = new Simulator(numberCities);
var cities = sim.BuildCities();
sim.PrintCityNeighbours(cities);
Random rnd = new Random();
int startCity = rnd.Next(numberCities);
int targetCity = rnd.Next(numberCities);
while (targetCity == startCity)
{
targetCity = rnd.Next(numberCities);
}
Console.WriteLine("");
Console.WriteLine("start and target: " + startCity + " " + targetCity);
Console.WriteLine("");
sim.FindPath(startCity, targetCity, cities);
}