Valid palindrome ignoring punctuation
Given a string s, return True if it reads the same forwards and backwards considering only alphanumeric characters and ignoring case; otherwise return False. Non-alphanumeric characters (spaces, punctuation) are skipped entirely. An empty or all-punctuation string is considered a palindrome.
Implement
is_clean_palindrome(s: str) → boolExamples
in
["A man, a plan, a canal: Panama"]outtrueWhat a strong answer looks like
State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.
0:00 of about 10 min
solution.py
InputExpectedGot
["A man, a plan, a canal: Panama"]truenot run yetsample