How to Solve Valid Palindrome Problem
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Valid Palindrome
A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters...
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Understanding the Valid Palindrome Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
A phrase is a palindrome if, after converting all uppercase letters into lowercase letters and removing all non-alphanumeric characters, it reads the same forward and backward. Alphanumeric characters include letters and numbers. Given a string s, return true if it is a palindrome, or false otherwise.
Valid Palindrome
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Examples
s = "A man, a plan, a canal: Panama"true"amanaplanacanalpanama" is a palindrome.
s = "race a car"false"raceacar" is not a palindrome.
s = " "trues is an empty string "" after removing non-alphanumeric characters. Since an empty string reads the same forward and backward, it is a palindrome.
Constraints
1 <= s.length <= 2 * 105s consists only of printable ASCII characters.How Interview Coder Helps with Leetcode Problems
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