day 2

day-02/part-1.py

@@ -0,0 +1,22 @@
+import aocd
+
+def parse(data):
+    for range_ in data.strip().split(','):
+        yield range_.split('-')
+
+def num_invalid(low, high):
+    low_int, high_int = int(low), int(high)
+
+    for id in map(str, range(low_int, high_int+1)):
+        if len(id) % 2: continue
+        if id[:len(id)//2] == id[len(id)//2:]:
+            yield int(id)
+
+def main(data):
+    ranges = parse(data)
+    return sum(sum(num_invalid(*r)) for r in ranges)
+
+if __name__ == '__main__':
+    solution = main(aocd.get_data(day=2, year=2025))
+    print(solution)
+    aocd.submit(solution, part='a', day=2, year=2025)

day-02/part-2.py

@@ -0,0 +1,23 @@
+import aocd
+
+import re
+
+def parse(data):
+    for range_ in data.strip().split(','):
+        yield range_.split('-')
+
+def num_invalid(low, high):
+    low_int, high_int = int(low), int(high)
+
+    for id in range(low_int, high_int+1):
+        if re.match(r'^((.+)\2+)$', str(id)):
+            yield int(id)
+
+def main(data):
+    ranges = parse(data)
+    return sum(sum(num_invalid(*r)) for r in ranges)
+
+if __name__ == '__main__':
+    solution = main(aocd.get_data(day=2, year=2025))
+    print(solution)
+    aocd.submit(solution, part='b', day=2, year=2025)