AdventOfCode23/Day6/Program.cs

using Day6;

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

var inputFile = args[0];
var parser = new RaceTimeParser();

var races = parser.Parse(inputFile);
var total = 1L;

foreach (var race in races)
{
    var bound = race.LowerBound();
    Console.WriteLine($"{race.Duration} / {race.Distance} => {bound}");
    var options = race.Duration - 2 * bound + 1;
    Console.WriteLine($"Options: {options}");

    total *= options;
}

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

var combinedTime = 0L;
var combinedDistance = 0L;
foreach (var race in races)
{
    combinedTime = combinedTime * (long)Math.Pow(10, (int)Math.Ceiling(Math.Log10(race.Duration))) + race.Duration;
    combinedDistance = combinedDistance * (long)Math.Pow(10, (int)Math.Ceiling(Math.Log10(race.Distance))) + race.Distance;
}

var actualRace = new RaceStats(combinedTime, combinedDistance);
var actualBound = actualRace.LowerBound();
Console.WriteLine($"{actualRace.Duration} / {actualRace.Distance} => {actualBound}");
var actualOptions = actualRace.Duration - 2 * actualBound + 1;
Console.WriteLine($"Options: {actualOptions}");

return 0;