* 方式1:翻转字符串 */publicstaticbooleanvalindPalindrome(Stringstr){//去掉非字母和数字的字符Stringstr1 = str.replaceAll("[^a-zA-Z0-9]","");//字母全转为小写Stringstr2 = str1.toLowerCase();//翻转字符串Stringstr3 =newStringBuilder(str2).reverse().toString();//对比翻转前与翻转后的字符...
【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. ...
This is a good question to ask during an interview. For the purpose of this problem, we define empty string as valid palindrome. 前面做过一次回文数的判断,回文数比这个题目难度大点,因为回文数不能用额外的空间,如果让用额外的空间就变成了本题,本题难点在于要去除标点符号,同时要忽略大小写,那么用jav...
is_palindrome(s, l + 1, r) or Solution.is_palindrome(s, l, r - 1) # 此时 s[l] 和 s[r] 相等,可以继续处理。 #将 l 向右移动一位 l += 1 #将 r 向左移动一位 r -= 1 # 此时说明 s 本身就是回文,直接返回 True return True @staticmethod def is_palindrome(s: str, l: int,...
For the purpose of this problem, we define empty string as valid palindrome. 算法: AI检测代码解析 1. public boolean isDecent(char c) { 2. if (Character.isAlphabetic(c) || Character.isDigit(c)) { 3. return true; 4. else 5. return false; ...
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...
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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.
"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. classSolution:defisPalindrome(self,s):""" ...
Learn how to solve the Valid Palindrome issue in Leetcode easily. Check out the code snippets that show you exactly how to do it.