Given an integer
x is palindrome integer.
An integer is a palindrome when it reads the same backward as forward.
- For example,
121is a palindrome while
Input: x = 121 Output: true Explanation: 121 reads as 121 from left to right and from right to left.
Input: x = -121 Output: false Explanation: From left to right, it reads -121. From right to left, it becomes 121-. Therefore it is not a palindrome.
Input: x = 10 Output: false Explanation: Reads 01 from right to left. Therefore it is not a palindrome.
-231 <= x <= 231 - 1
Follow up: Could you solve it without converting the integer to a string?
return False if x < 0 else x == int(str(x)[::-1])
class Solution: def isPalindrome(self, x): """ :type x: int :rtype: bool """ if x < 0: return False str_1 = str(abs(x)) str_2 = str_1[::-1] if str_1 == str_2: return True else: return False