[LeetCode] Palindrome Number

题目

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

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

代码

11507 / 11507 test cases passed.
Runtime: 132 ms

#define rint register int

bool isPalindrome(int x) {
    if (x < 0) return false;

    rint n = 0;
    rint m = x;
    while (m > 0) {
        n = n*10 + (m % 10);
        m /= 10;
    }
    //printf("%d\n", n);
    return (x == n);
}