day 8, yes day 7 was skipped, its annoying lol

7.py

@@ -0,0 +1,45 @@
+import string
+
+import aoclib
+
+from pathlib import PurePath
+
+
+inp = aoclib.get_input(7, parser=aoclib.parse_lines)
+
+
+class FileSystem:
+    def __init__(self, shell_log: list[str]):
+        fs = {"/": {}}
+        cwd = PurePath()
+        for line in shell_log:
+            if line.startswith("$"):
+                _, cmd = line.split(" ", maxsplit=1)
+                if cmd.startswith("cd"):
+                    _, to = cmd.split(" ")
+                    if to == "..":
+                        cwd = cwd.parent
+                    else:
+                        cwd /= to
+            else:  # is ls output
+                if line.startswith("dir"):
+                    _, dirname = line.split(" ")
+                else:
+                    size, name = line.split(" ")
+
+
+def part1():
+    total = 0
+    for line in inp:
+        if line[0] in string.digits:
+            size, _ = line.split(" ")
+            total += int(size)
+
+    return "haha fuck this day, im not doing it"
+
+
+def part2():
+    ...
+
+
+aoclib.main(part1, part2)

8.py

@@ -0,0 +1,101 @@
+import aoclib
+
+
+inp = aoclib.get_input(8, parser=aoclib.parse_lines_with_func(lambda line: [int(c) for c in line]))
+
+
+class Forest:
+    class Directions:
+        UP = (-1, 0)
+        DOWN = (1, 0)
+        LEFT = (0, -1)
+        RIGHT = (0, 1)
+        ALL = (UP, DOWN, LEFT, RIGHT)
+
+    def __init__(self, grid):  # assumes rect grid
+        self.grid = grid
+        self.max = (len(grid[0]), len(grid))
+
+    def is_tree_visible(self, x: int, y: int):
+        return any([self._tree_visible_from(direction, x, y) for direction in self.Directions.ALL])
+
+    def _tree_visible_from(self, direction, x, y):
+        main = self._get_tree(x, y)
+        others = self._get_all_trees_in_dir(direction, x, y)
+        return all([o < main for o in others])
+
+    def _get_all_trees_in_dir(self, direction, x, y):
+        trees = []
+        dx, dy = direction
+        while True:
+            x += dx
+            y += dy
+            tree = self._get_tree(x, y)
+            if tree is not None:
+                trees.append(tree)
+            else:
+                return trees
+
+    def scenic_score_for_pos(self, x, y):
+        prod = 1
+        for d in self.Directions.ALL:
+            prod *= self._get_scenic_score_in_dir(d, x, y)
+            if prod == 0:
+                break
+        return prod
+
+    def _get_scenic_score_in_dir(self, direction, x, y):
+        house = self._get_tree(x, y)
+        count = 0
+        for tree in self._get_trees_in_dir_iter(direction, x, y):
+            count += 1
+            if tree >= house:
+                break
+
+        return count
+
+    def _get_trees_in_dir_iter(self, direction, x, y):
+        dx, dy = direction
+        while True:
+            x += dx
+            y += dy
+            tree = self._get_tree(x, y)
+            if tree is not None:
+                yield tree
+            else:
+                break
+
+    def _get_tree(self, x, y):
+        if x < 0 or y < 0:
+            return None
+        try:
+            return self.grid[y][x]
+        except IndexError:
+            return None
+
+
+def part1():
+    f = Forest(inp)
+    xmax, ymax = f.max
+    count = 0
+    for x in range(xmax):
+        for y in range(ymax):
+            if f.is_tree_visible(x, y):
+                count += 1
+
+    return count
+
+
+def part2():
+    f = Forest(inp)
+    xmax, ymax = f.max
+    highest = 0
+    for x in range(xmax):
+        for y in range(ymax):
+            if (current := f.scenic_score_for_pos(x, y)) > highest:
+                highest = current
+
+    return highest
+
+
+aoclib.main(part1, part2)

inputs/8

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prompts/8

@@ -0,0 +1,76 @@
+--- Day 8: Treetop Tree House ---
+
+The expedition comes across a peculiar patch of tall trees all planted carefully in a grid. The Elves explain that a previous expedition planted these trees as a reforestation effort. Now, they're curious if this would be a good location for a tree house.
+
+First, determine whether there is enough tree cover here to keep a tree house hidden. To do this, you need to count the number of trees that are visible from outside the grid when looking directly along a row or column.
+
+The Elves have already launched a quadcopter to generate a map with the height of each tree (your puzzle input). For example:
+
+30373
+25512
+65332
+33549
+35390
+
+Each tree is represented as a single digit whose value is its height, where 0 is the shortest and 9 is the tallest.
+
+A tree is visible if all of the other trees between it and an edge of the grid are shorter than it. Only consider trees in the same row or column; that is, only look up, down, left, or right from any given tree.
+
+All of the trees around the edge of the grid are visible - since they are already on the edge, there are no trees to block the view. In this example, that only leaves the interior nine trees to consider:
+
+    The top-left 5 is visible from the left and top. (It isn't visible from the right or bottom since other trees of height 5 are in the way.)
+    The top-middle 5 is visible from the top and right.
+    The top-right 1 is not visible from any direction; for it to be visible, there would need to only be trees of height 0 between it and an edge.
+    The left-middle 5 is visible, but only from the right.
+    The center 3 is not visible from any direction; for it to be visible, there would need to be only trees of at most height 2 between it and an edge.
+    The right-middle 3 is visible from the right.
+    In the bottom row, the middle 5 is visible, but the 3 and 4 are not.
+
+With 16 trees visible on the edge and another 5 visible in the interior, a total of 21 trees are visible in this arrangement.
+
+Consider your map; how many trees are visible from outside the grid?
+
+Your puzzle answer was [full of wild kittens!].
+
+--- Part Two ---
+
+Content with the amount of tree cover available, the Elves just need to know the best spot to build their tree house: they would like to be able to see a lot of trees.
+
+To measure the viewing distance from a given tree, look up, down, left, and right from that tree; stop if you reach an edge or at the first tree that is the same height or taller than the tree under consideration. (If a tree is right on the edge, at least one of its viewing distances will be zero.)
+
+The Elves don't care about distant trees taller than those found by the rules above; the proposed tree house has large eaves to keep it dry, so they wouldn't be able to see higher than the tree house anyway.
+
+In the example above, consider the middle 5 in the second row:
+
+30373
+25512
+65332
+33549
+35390
+
+    Looking up, its view is not blocked; it can see 1 tree (of height 3).
+    Looking left, its view is blocked immediately; it can see only 1 tree (of height 5, right next to it).
+    Looking right, its view is not blocked; it can see 2 trees.
+    Looking down, its view is blocked eventually; it can see 2 trees (one of height 3, then the tree of height 5 that blocks its view).
+
+A tree's scenic score is found by multiplying together its viewing distance in each of the four directions. For this tree, this is 4 (found by multiplying 1 * 1 * 2 * 2).
+
+However, you can do even better: consider the tree of height 5 in the middle of the fourth row:
+
+30373
+25512
+65332
+33549
+35390
+
+    Looking up, its view is blocked at 2 trees (by another tree with a height of 5).
+    Looking left, its view is not blocked; it can see 2 trees.
+    Looking down, its view is also not blocked; it can see 1 tree.
+    Looking right, its view is blocked at 2 trees (by a massive tree of height 9).
+
+This tree's scenic score is 8 (2 * 2 * 1 * 2); this is the ideal spot for the tree house.
+
+Consider each tree on your map. What is the highest scenic score possible for any tree?
+
+Your puzzle answer was [actually fun this time].
+