LetCode 9. 回文数

static auto x = []()
{    
    std::ios::sync_with_stdio(false);    
    std::cin.tie(0);    
    return 0;
}();
class Solution {
public:
    bool isPalindrome(int x) {
        if (x == 0)
            return true;
        if (x < 0 || x % 10 == 0)
            return false;
        int palindrome_num = 0;        
        while(x > palindrome_num){
            palindrome_num = palindrome_num * 10 + x % 10;
            x /= 10;
        }        
        return x == palindrome_num || x == palindrome_num / 10;
    }
};