day9

2025/day09.py

@@ -0,0 +1,63 @@
+"""Day X: Advent of Code 2025."""
+
+import time
+from itertools import combinations
+from aoc import read_lines
+from shapely.geometry import Polygon, box
+from shapely.prepared import prep
+
+
+def calculate_area(corner1, corner2):
+    """Räknar ut arean av en rektangel givet två motstående hörn."""
+    x1, y1 = map(int, corner1.split(","))
+    x2, y2 = map(int, corner2.split(","))
+    width = abs(x2 - x1) + 1
+    height = abs(y2 - y1) + 1
+    return width * height
+
+def create_box(corner1, corner2):
+    """Räknar ut arean av en rektangel givet två motstående hörn."""
+    x1, y1 = map(int, corner1.split(","))
+    x2, y2 = map(int, corner2.split(","))
+    return box(x1,y1,x2,y2)
+
+def parse_coord(s):
+      x, y = s.split(",")
+      return (int(x), int(y))
+
+def part1(data):
+    max_size = 0
+    for c1, c2 in combinations(data, 2):
+        area = calculate_area(c1, c2)
+        if area > max_size:
+            max_size = area
+    return max_size
+
+
+def part2(data):
+    coords = [parse_coord(line) for line in data]
+    shape = Polygon(coords)
+    prepared_shape = prep(shape)
+    max_size = 0
+    for c1, c2 in combinations(data, 2):
+        area = calculate_area(c1, c2)
+        if area > max_size:
+            box = create_box(c1, c2)
+            if prepared_shape.contains(box):
+                max_size = area
+    return max_size
+
+
+if __name__ == "__main__":
+    DAY = 9  # <- ändra till rätt dag
+    data = read_lines(DAY)
+
+    t0 = time.perf_counter()
+    p1 = part1(data)
+    t1 = time.perf_counter()
+    print(f"Part 1: {p1}  ({(t1-t0)*1000:.2f} ms)")
+
+    t0 = time.perf_counter()
+    p2 = part2(data)
+    t1 = time.perf_counter()
+    print(f"Part 2: {p2}  ({(t1-t0)*1000:.2f} ms)")