class Solution {
    public boolean isPalindrome(int x) {
        if (x < 0 || x > 0 && x % 10 == 0)
            return false;
        int rev = 0;
        while (x > rev) {
            rev = rev * 10 + x % 10;
            x /= 10;
        }
        return (x == rev || x == rev / 10);
    }
}