1、注意空字符串的处理; 2、注意是alphanumeric字符; 3、字符串添加字符直接用+就可以; 1classSolution:2#@param s, a string3#@return a boolean4defisPalindrome(self, s):5ret =False6s =s.lower()7ss =""8foriins:9ifi.isalnum():10ss +=i11h =012e = len(ss)-113while(h<e):14if(ss...
代码(Python3) class Solution: def validPalindrome(self, s: str) -> bool: # 定义左指针 l ,初始化为 0 l: int = 0 # 定义右指针 r ,初始化为 s.length - 1 r: int = len(s) - 1 # 当还有字符需要比较时,继续处理 while l < r: # 如果 s[l] 和 s[r] 不相等,则需要删除字符 if...
这道题用python的列表生成器和列表操作能够非常简洁的解决,思路是先用列表生成器去掉除数字和字母以外的字符得到一个新的字符串,然后直接推断该串和该串的逆序是否相等就可以。 代码实现例如以下 classSolution:defisPalindrome(self, s): newS=[i.lower()foriinsifi.isalnum()]returnnewS==newS[::-1]...
【LeetCode】5. Valid Palindrome·有效回文 秦她的菜 吉利 程序员 来自专栏 · Leetcode刷题笔记 题目描述 英文版描述 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. ...
题目链接:https://leetcode.com/problems/valid-palindrome/ 题目: 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. ...
LeetCode-Valid Palindrome II Description: Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome. Example 1: AI检测代码解析 Input: "aba" Output: True 1. 2. Example 2: AI检测代码解析...
每天一个easy题的think loud, 希望能有天回过头来发现自己进步了很多, 视频播放量 20、弹幕量 0、点赞数 0、投硬币枚数 0、收藏人数 0、转发人数 0, 视频作者 出卖真心的女孩, 作者简介 世界尽头的海,相关视频:力扣2475,leetcode1469 Find All The Lonely Nodes,leetcod
LeetCode 125:Valid Palindrome(有效回文) Q:Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Note: For the purpose of this problem, we define empty string as valid palindrome.
Valid Palindrome tags: [palindrome] Question leetcode: Valid Palindrome | LeetCode OJ lintcode: (415) Valid Palindrome Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Example "A man, a plan, a canal: Panam...
Can you solve this real interview question? 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 c