// Source : https://oj.leetcode.com/problems/valid-palindrome/ // Author : Hao Chen // Date : 2014-06-26 /********************************************************************************** * * Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. * * For example, * "A man, a plan, a canal: Panama" is a palindrome. * "race a car" is not a palindrome. * * Note: * Have you consider that the string might be empty? This is a good question to ask during an interview. * * For the purpose of this problem, we define empty string as valid palindrome. * * **********************************************************************************/ class Solution { public: bool isPalindrome(string s) { s = removeNoise(s); for(int i=0; i