leetcode9-会文数

方法一：转化为字符串，然后反转 

class Solution:
    def isPalindrome(self, x):
        """
        :type x: int
        :rtype: bool
        """
        if x<0:
            return False
        else:
            x=str(x)
            y=x[::-1]
            if x==y:
                return True
            else:
                return False