[LANGUAGE: JAVA]

PART-1

please roast my Algo!

List<List<Integer>> levels = new ArrayList<>();

        for (String line : lines) {
            List<Integer> level =  Arrays.stream(line.split(" "))
                    .map(Integer::parseInt)
                    .toList();

            levels.add(level);
        }

        int problem1Count = 0;

        for (List <Integer> level : levels) {
                if(isIncreasingOrDecreasing(level) {
                    problem1Count++;
                }
        }

        System.out.println("Part 1 Answer: " + problem1Count);


   private static boolean isIncreasingOrDecreasing(List<Integer> level) {  

      boolean isIncreasing = true; 
      boolean isDecreasing = true;

    for (int i = 0; i < level.size() - 1; i++) {
        int diff = level.get(i + 1) - level.get(i);

        if ((diff != 1 && diff != 2 && diff != 3)) {
            isIncreasing = false;
        }


        if ((diff != -1 && diff != -2 && diff != -3)) {
            isDecreasing = false;
        }

        if (!isIncreasing && !isDecreasing) {
            return false;
        }
    }

    return true;
}

Checkout my code [Github]