Palindrome Number

最新推荐文章于 2024-10-27 22:09:20 发布

小菜鸟的leetcode

最新推荐文章于 2024-10-27 22:09:20 发布

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文章标签： int overflow need another try

本文链接：https://blog.youkuaiyun.com/Scarlett_leetcode/article/details/51303519

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Determine whether an integer is a palindrome. Do this without extra space.

要考虑overflow

class Solution {
public:
    bool isPalindrome(int x) {
        if(x < 0) return false;
        
        int base = 1;
        while(base <= x/10) {
            base *= 10;
        }
        
        while(base > 1) {
            int d1 = x/base, d2 = x%10;
            if(d1 != d2) return false;
            x %= base;
            x/= 10;
            base /= 100;
        }
        return true;
    }
};