AdventOfCode23/Day8/Program.cs

using System.Diagnostics;

using Day8;

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 mapData = parser.Parse(inputFile);
var steps = mapData.Walk();
Console.WriteLine();
Console.WriteLine($"Steps: {steps}");

Console.WriteLine();

var cycles = mapData.MultiWalk();
Console.WriteLine();

var factors = new HashSet<long>();
foreach (var cycle in cycles)
{
    var cycleFactors = Primes.Factorize(cycle).ToList();
    Console.WriteLine($"{cycle} => {string.Join(" * ", cycleFactors)}");
    foreach (var f in cycleFactors)
    {
        factors.Add(f);
    }
}

Console.WriteLine($"LCM => {string.Join(" * ", factors)} = {factors.Aggregate(1L, (acc, x) => acc * x)}");

return 0;