[LeetCode] Valid Palindrome 验证回文字符串
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example, "A man, a plan ...
原文：[LeetCode] Valid Parenthesis String 验证括号字符串
Given a string containing only three types of characters: , and , write a function to check whether this string is valid. We define the validity of a string by these rules: Any left parenthesis must ...
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验证回文字符串（leetcode）
题目描述如下： 给定一个字符串，验证它是否是回文串，只考虑字母和数字字符，可以忽略字母的大小写。 说明：本题中，我们将空字符串定义为有效的回文串。 示例 1: 示例 2: class Solution { public: bool isPalindrome ...