Day 3

03.py

+import re
+from collections import defaultdict
+
+with open('data/03.txt', 'r') as file:
+    cells = defaultdict(list)
+    claims = map(lambda l: map(int, re.findall(r'\d+', l)), file.readlines())
+    ids = set()
+
+    for (cid, x, y, width, height) in claims:
+        ids.add(cid)
+        for i in range(width):
+            for j in range(height):
+                cells[(x + i, y + j)].append(cid)
+
+    overlaps = [c for c in cells.values() if len(c) > 1]
+    print(len(overlaps))
+
+    dupes = set(cid for sublist in overlaps for cid in sublist)
+    print(list(ids - dupes)[0])