public static long Part2(BagRules rules)
{
if (rules == null)
{
throw new ArgumentNullException(nameof(rules));
}
return(rules.GetBagByColor("shiny gold").ContainedBags() - 1);
}
public static long Part1(BagRules rules)
{
if (rules == null)
{
throw new ArgumentNullException(nameof(rules));
}
return(rules.Bags.Where((bag) => bag.CanContain("shiny gold")).Count());
}
public static int Main(string[] args)
{
if (args == null)
{
throw new ArgumentNullException(nameof(args));
}
string filename = args.Length > 0 ? args[0] : "input.txt";
if (!File.Exists(filename))
{
Console.Error.WriteLine($"File not found: {filename}");
return(100);
}
BagRules rules = BagRules.FromString(File.ReadAllText(filename));
Console.WriteLine(Solver.Part1(rules));
Console.WriteLine(Solver.Part2(rules));
return(0);
}