var lines = File.ReadAllLines("input.txt");

var reports = lines.Select(line => line.Split(" ").ToList()).ToList();

int safeReportsNumber = 0, problemDampenerSafeReports = 0;

for (int i = 0; i < reports.Count; i++)
{
    var currentReport = reports[i].Select(x => int.Parse(x)).ToList();

    if (IsReportSafe(currentReport)) safeReportsNumber++;

    if (IsReportSafeWithDampener(currentReport)) problemDampenerSafeReports++;
}

Console.WriteLine($"Part1: {safeReportsNumber}\nPart2: {problemDampenerSafeReports}");

bool IsReportSafe(List<int> levels)
{
    var isAscending = levels.SequenceEqual(levels.OrderBy(x => x));
    var isDescending = levels.SequenceEqual(levels.OrderByDescending(x => x));
    var allValidDifferennce = levels.Zip(levels.Skip(1), (a, b) => Math.Abs(a - b) > 0 && Math.Abs(a - b) < 4).All(x => x);

    return (isAscending || isDescending) && allValidDifferennce;
}

bool IsReportSafeWithDampener(List<int> levels)
{
    if (IsReportSafe(levels)) return true;

    // Performance killa..
    for (int i = 0; i < levels.Count; i++)
    {
        var modifiedLevels = new List<int>(levels);
        modifiedLevels.RemoveAt(i);

        if (IsReportSafe(modifiedLevels)) return true;
    }

    return false;
}