did day10 and day12 part 1

2024/day10/p1.py

@@ -0,0 +1,66 @@
+with open('input.text', 'r') as file:
+    data: list[str] = file.readlines()
+
+topo_map = [[int(c) if c != '.' else -1 for c in line.strip()] for line in data]
+
+x_bound: int = len(topo_map[0]) - 1
+y_bound: int = len(topo_map) - 1
+
+class Coord:
+    x: int
+    y: int
+
+    def __init__(self, x: int, y: int):
+        self.x = x
+        self.y = y
+
+    def __str__(self) -> str:
+        return f'({self.x}, {self.y})'
+
+    def __eq__(self, o) -> bool:
+        return o.x == self.x and o.y == self.y
+
+def in_bounds(c: Coord) -> bool:
+    if c.y > y_bound or c.y < 0:
+        return False
+
+    if c.x > x_bound or c.x < 0:
+        return False
+
+    return True
+
+def score_trail(c: Coord, last: int | None = 0) -> list[Coord]:
+
+    if not in_bounds(c):
+        return None
+
+    v: int = topo_map[c.y][c.x]
+    if v == 9:
+        return [c]
+
+    if v - last != 1 and last != 0:
+        return None
+
+    up, down, left, right = Coord(c.x, c.y - 1), Coord(c.x, c.y + 1), Coord(c.x - 1, c.y), Coord(c.x + 1, c.y)
+
+    nines = []
+
+    for dir in [up, down, left, right]:
+        if in_bounds(dir):
+            if topo_map[dir.y][dir.x] - v == 1:
+                for nine in score_trail(dir, v):
+                    if nine not in nines:
+                        nines.append(nine)
+
+    return nines
+
+total = 0
+for y, line in enumerate(topo_map):
+    for x, n in enumerate(line):
+        if n == 0:
+            total += len(score_trail(Coord(x, y)))
+
+print(total)
+
+
+