Palindrome Number

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

题目大意：判断一个数字时候是回文，不允许有额外的空间

题目难度：Easy

/**
 * Created by gzdaijie on 16/5/4
 * 与第七题是相同的,判断翻转后的数字是否等于原来的数字即可
 * 担心翻转后溢出,故使用了long
 */
public class Solution {
    public boolean isPalindrome(int x) {
        if (x < 0) return false;

        long y = x;
        long result = 0;
        while (x > 0) {
            result = result * 10 + x % 10;
            x /= 10;
        }
        return result == y;
    }
}