题目如图,下面是我的解决方法: class Solution { public boolean isPalindrome(int x) { if(x < 0) //由题意可知,小于0的数不可能为回数, 因此直接返回false 4 return false; else { String len = x + ""; int[] arr = new int[len.length()]; //创建数组arr, 长度为x的位数 int result = 0; int q = x; for(…

leetcode bug & 9. Palindrome Number bug shit bug "use strict"; /** * * @author xgqfrms * @license MIT * @copyright xgqfrms * @created 2020-07-23 * @modified * * @description 9. Palindrome Number * @difficulty Easy * @complexity O(n) * @augme…

我现在在做一个叫<leetbook>的开源书项目,把解题思路都同步更新到github上了,需要的同学可以去看看 地址:https://github.com/hk029/leetcode 这个是书的地址:https://hk029.gitbooks.io/leetbook/ 009. Palindrome Number[E] 问题: Determine whether an integer is a palindrome. Do this without extra space. 思路 这里说不…

Palindrome Number time=434ms 负数不是回文数 public class Solution { public boolean isPalindrome(int x) { int palindrome=0; int revers=x; if(revers<0) return false; else{ while(revers>0){ int m=revers%10; palindrome=m+palindrome*10; revers=revers/10; } if(p…

9. Palindrome Number 题目: Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the…

Palindrome Number Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restri…

前言   [LeetCode 题解]系列传送门:  http://www.cnblogs.com/double-win/category/573499.html   1.题目描述 Determine whether an integer is a palindrome. Do this without extra space. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of c…

题目要求判断一个整数是不是回文数,假设输入是1234321,就返回true,输入的是123421,就返回false.题目要求in-place,思路其实很简单,在LeetCode(7)里面我们刚好做了reverse integer,我们就可以利用reverse integer得到一个reverse number,然后和输入作对比,如果与输入一致,则返回true,如果不一致,则返回false.代码如下: public class Solution { public boolean isPalindr…

一天一道LeetCode系列 (一)题目 Determine whether an integer is a palindrome. Do this without extra space. Some hints: Could negative integers be palindromes? (ie, -1) If you are thinking of converting the integer to string, note the restriction of using extra…

这是悦乐书的第144次更新,第146篇原创 今天这道题和回文有关,即从前往后和从后往前是一样的,如"上海自来水来自海上"就是一个回文字符串,如整数121就是回文数,这些都是和回文相关的. 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第3题(顺位题号是9),给定一个整数,判断其是否为回文整数,即向前读和向后读的整数一样. 输入: 121 输出: true 输入: -121 输出: false 说明:从左到右读为-121.从右到左读为121-.因此它不是回文. 输入…