2025 - Day 2 part 2

2025/2/2_2.py

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+#!/usr/bin/env python
+# 2025 - Advent Of Code 2 - part2
+
+# file = 'input_example.txt'
+file = 'input.txt'
+
+ranges = []
+bad_id = []
+with open(file, encoding="utf-8") as f:
+    for line in f.readlines():
+        for r in line.split(','):
+            (startr, endr) = r.split('-')
+            for i in range(int(startr), int(endr)+1):
+                ranges.append(str(i))
+
+print(f"ranges to inspect {len(ranges)}")
+# print(ranges)
+
+for product_id in ranges:
+    for pivot in range(1, int(len(product_id) / 2) + 1):
+        bad = True
+        complete_pattern = 0
+        for cursor in range(0, len(product_id)):
+            if product_id[cursor % pivot] != product_id[cursor]:
+                bad = False
+                break
+        complete_pattern = (cursor + 1) % pivot
+
+        if bad and complete_pattern == 0:
+            bad_id.append(int(product_id))
+
+print(f'bad id: {len(bad_id)}')
+print(f'dedup bad id: {len(set(bad_id))}')
+print(sum(set(bad_id)))