Day 4

src/day4.py

@@ -0,0 +1,21 @@
+code_range = (356261, 846304)
+
+part1_count = 0
+part2_count = 0
+for num in range(*code_range):
+  digits = [int(x) for x in str(num)]
+  has_adjacents = False
+  groups = {}
+  for index, d in enumerate(digits):
+    if index < 5:
+      if digits[index + 1] == d:
+        has_adjacents = True
+        groups[d] = groups[d] + 1 if d in groups else 2
+      if digits[index + 1] < d:
+        break
+  if index == 5 and has_adjacents:
+    part1_count += 1
+    if any([c == 2 for c in groups.values()]):
+      part2_count += 1
+
+print(f'Part 1 count: {part1_count}, Part 2 count: {part2_count}')