class Solution:
    def isPalindrome(self, x: int) -> bool:
        if x < 0:
            return False
        if x == 0:
            return True

        return self.is_palindrome(str(x))

    def is_palindrome(self, s):
        start = 0
        end = len(s) - 1
        while(start < end):
            if s[start] == s[end]:
                start += 1
                end -= 1
            else:
                return False

        return True