判断一个数是否是回文数 方法是将数回转,看回转的数和原数是否相同 class Solution { public: bool isPalindrome(int x) { ) return false; ; int n = x; ){ _x = _x * + x%; } return n == _x; } };…

9. Palindrome Number Question: Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121 Output: true Example 2: Input: -121 Output: false Explanation: From left to righ…

9. Palindrome Number Easy Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121 Output: true Example 2: Input: -121 Output: false Explanation: From left to right, it…

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 restriction of using ext…

Determine whether an integer is a palindrome. Do this without extra space. 题目标签:Math 题目给了我们一个int x, 让我们判断它是不是回文数字. 首先,负数就不是回文数字,因为有个负号. 剩下的都是正数,只要把数字 reverse 一下,和原来的比较,一样就是回文. 当有overflow 的时候,返回一个负数就可以了(因为负数肯定不会和正数相等). Java Solution: Runtime beats 61.…

Determine whether an integer is a palindrome. Do this without extra space.(不要使用额外的空间) 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 space. You…

# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com'https://oj.leetcode.com/problems/palindrome-number/ Determine whether an integer is a palindrome. Do this without extra space. Some hints:Could negative integers be palindromes? (ie, -1) If…

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 space. You could a…

Determine whether an integer is a palindrome. Do this without extra space. 题目意思:判断一个整数是否是回文数 例如:123211,1221即为回文数,110则不是回文数 =================================================================== 思路一: 现将这个整数反转,然后判断返转后的数是否与原来的是相等,相等则为回文数,反之则不是. 利用了上一题[Leet…

Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121 Output: true Example 2: Input: -121 Output: false Explanation: From left to right, it reads -121. From right to…