private static void Main(string[] args)
{
string directions = File.ReadAllText("input.txt");
var drunkElf = new DrunkElf(directions);
var santa = new Santa();
drunkElf.NavigateSantaToDeliverPresents(santa);
Console.WriteLine($"This year, with a help of that drunken elf, {santa.NumberOfHousesVisistedAtleastOnce} houses received at least one present.");
Console.WriteLine("\n~A Year Later....~\n");
santa = new Santa();
var roboSanta = new Santa();
drunkElf.NavigateSantasToDeliverPresents(santa, roboSanta);
House[] uniqueHousesVisitedByBothSantas = GetUniqueSantasCombinedVisitedHouses(santa, roboSanta).ToArray();
Console.WriteLine($"That elf got drunk again, ugh...");
Console.WriteLine($"This time we went with my little helper, Robo-Santa.");
Console.WriteLine($"This year {uniqueHousesVisitedByBothSantas.Length} houses received at least one present from us both.");
}
private static IEnumerable <House> GetUniqueSantasCombinedVisitedHouses(Santa santa, Santa roboSanta)
{
return(new HashSet <House>(santa.VisitedHouses.Concat(roboSanta.VisitedHouses)));
}