Fitting presents

Author: jburgy

aoc2025/day12.py

@@ -0,0 +1,13 @@
+from pathlib import Path
+
+lines = Path("aoc2025/day12input.txt").read_text().splitlines()
+tiles = ["".join(lines[start + 1 : start + 4]).count("#") for start in range(0, 30, 5)]
+
+count = 0
+for line in lines[30:]:
+    board, _, presents = line.rstrip().partition(": ")
+    height, _, width = board.partition("x")
+    count += sum(
+        tile * int(present) for tile, present in zip(tiles, presents.split())
+    ) < int(height) * int(width)
+print(count)