AdventOfCode23/Day21/Program.cs

using System.Diagnostics;

using Day21;

if (args.Any(a => a == "--debug"))
{
    Console.WriteLine("DEBUG");
    Console.WriteLine(Debugger.Launch());
}

if (args.Length < 1)
{
    Console.WriteLine("Requires 1 args: inputFileName");
    return -1;
}

var inputFile = args[0];
var parser = new Parser();
var map = parser.Parse(inputFile);

var reachable = map.ReachableTiles(64);
Console.WriteLine();
Console.WriteLine($"Reachable: {reachable}");

return 0;