回文数

class Solution:
    def isPalindrome(self, x: int) -> bool:
        if x == 0:
            return True
        elif x < 0 or x % 10 == 0:
            return False
        else:
            low = 0
            while x > low:
                low = (x % 10) + low * 10
                x //= 10
            else:
                if x == low or x == low // 10:
                    return True
                else:
                    return False