Solution: Valid Palindrome
Understand how to implement the two pointers technique to determine if a given string is a valid palindrome. This lesson guides you through skipping non-alphanumeric characters, comparing characters case-insensitively, and optimizing to O(n) time and O(1) space complexity for an efficient solution.
Statement
Given a string, s, return TRUE if it is a palindrome; otherwise, return FALSE.
A phrase is considered a palindrome if it reads the same backward as forward after converting all uppercase letters to lowercase and removing any characters that are not letters or numbers. Only alphanumeric characters (letters and digits) are taken into account.
Constraints:
s.length...