AdventOfCode23/Day15/Program.cs

using System.Diagnostics;

using Day15;

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 steps = parser.Parse(inputFile).ToList();

var sum = 0;
foreach (var s in steps)
{
    var hash = s.GetHash();
    sum += hash;
}

Console.WriteLine();
Console.WriteLine($"Total: {sum}");

var boxes = Enumerable.Range(0, 256).Select(_ => new List<Lens>()).ToList();
foreach (var s in steps)
{
    s.Execute(boxes);
    foreach (var pair in boxes.Select((box, index) => (Box: box, Index: index)))
    {
        if (pair.Box.Count > 0)
        {
            var contents = string.Join(" ", pair.Box.Select(lens => lens.Visual()));
            Console.WriteLine($"Box {pair.Index}: {contents}");
        }
    }
    Console.WriteLine("-----");
}

var power = boxes
    .SelectMany((box, boxIndex) => box.Select((lens, lensIndex) => (boxIndex + 1) * (lensIndex + 1) * lens.FocalLength))
    .Sum();
Console.WriteLine();
Console.WriteLine($"Power: {power}");


return 0;