// #define Day2
#if Day2
Position PartOne(Position p, Operation op) => op.op switch {
    "down" => new Position(p.f, p.d + op.x, p.aim),
    "up" => new Position(p.f, p.d - op.x, p.aim),
    _ => new Position(p.f + op.x, p.d, p.aim)
};

Position PartTwo(Position p, Operation op) => op.op switch {
    "down" => new Position(p.f, p.d , p.aim+ op.x),
    "up" => new Position(p.f, p.d, p.aim - op.x),
    _ => new Position(p.f + op.x, p.d + (p.aim * op.x), p.aim)
};


var linesSplit = File.ReadAllLines("day2/input")
    .Select(l => l.Split(" "))
    .Select(lineParts => new Operation(lineParts[0], long.Parse(lineParts[1])))
    .ToList();

var partOneResult = linesSplit.Aggregate(new Position(0, 0, 0), PartOne);
Console.WriteLine(partOneResult.f * partOneResult.d);

var partTwoResult = linesSplit.Aggregate(new Position(0, 0, 0), PartTwo);
Console.WriteLine(partTwoResult.f * partTwoResult.d);

record Operation(String op, long x);
record Position(long f, long d, long aim);
#endif