Solve part 1

Author: Paul2708

Day-25/python/paul2708/day25.py

@@ -0,0 +1,40 @@
+from shared.paul2708.input_reader import *
+from shared.paul2708.output import write
+
+lines = read_plain_input(day=25)
+keys = []
+locks = []
+
+for i in range(0, len(lines), 8):
+    if lines[i] == "#####":
+        locks.append(lines[i:i + 7])
+    else:
+        keys.append(lines[i:i + 7])
+
+
+def count_pins(schematic):
+    is_lock = schematic[0] == "#####"
+    count_char = "#" if is_lock else "."
+
+    heights = []
+    for i in range(len(schematic[0])):
+        height = 0
+
+        while height + 1 < len(schematic) and schematic[height + 1][i] == count_char:
+            height += 1
+
+        if not is_lock:
+            height = 5 - height
+
+        heights.append(height)
+
+    return heights
+
+
+pairs = 0
+for lock in locks:
+    for key in keys:
+        if all([a + b < 6 for a, b in zip(count_pins(lock), count_pins(key))]):
+            pairs += 1
+
+write(f"There are <{pairs}> fitting lock/key pairs.")