Valid palindrome
Given a string, determine whether it is a palindrome, considering only alphanumeric characters and ignoring case.
Implement
valid_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 15 min
solution.py
InputExpectedGot
["A man, a plan, a canal: Panama"]truenot run yetsample