CodingEasycod-g954

Subject StringsLevel Entry–Mid~10 minCommon in Algorithms & data structures interviewsIndustries Software development

Question

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) → bool

Examples

in["A man, a plan, a canal: Panama"]outtrue

What 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.

Learn the concepts

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.