leetcode palindrome number

class  {  
public:  
    bool isPalindrome(int x) {  
        if(x < 0) return false;  
        int d = 1;  
        while(x/d >= 10) d *= 10;  
        while(x > 0) {  
            int left = x / d;  
            int right = x % 10;  
            if(left != right) {  
                return false;  
            }  
            x = x % d / 10;  
            d = d / 100;  
        }  
        return true;  
    }  
};