Solve day2

day2/part2.py

@@ -0,0 +1,27 @@
+FILE = "input.txt"
+
+def main():
+    line = open(FILE).readlines()[0].strip()
+
+    ranges = [
+        [int(n) for n in l.split("-")]
+        for l in line.split(",")
+    ]
+
+    invalid_ids = [
+        id
+        for (start, end) in ranges
+        for id in range(start, end + 1)
+        if invalid(str(id))
+    ]
+
+    return sum(invalid_ids)
+
+def invalid(id: str) -> bool:
+    for n in range(1, len(id)//2 + 1):
+        sub = { id[i:i+n] for i in range(0, len(id), n) }
+        if len(sub) == 1: return True
+    return False
+
+if __name__ == "__main__":
+    print(main())