Leetcode 9. Palindrome Number

文章作者：Tyan
博客：noahsnail.com  |  CSDN  |  简书

1. Description

Palindrome Number

2. Solution

• Version 1

class Solution {
public:
    bool isPalindrome(int x) {
        if(x < 0) {
            return false;
        }
        int m = x;
        int y = 0;
        while(m) {
            y = y * 10 + m % 10;
            m /= 10;
        }
        return x == y;
    }
};

• Version 2

class Solution {
public:
    bool isPalindrome(int x) {
        if(x < 0 || (x != 0 && x % 10 == 0)) {
            return false;
        }
        int m = x;
        int y = 0;
        while(m) {
            y = y * 10 + m % 10;
            m /= 10;
        }
        return x == y;
    }
};

Reference

1. https://leetcode.com/problems/palindrome-number/description/