Given an integer x, return true if x is a palindrome, and false otherwise.
Example 1:
- Input: x = 121
- Output: true
- Explanation: 121 reads as 121 from left to right and from right to left.
Example 2:
- 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.
Example 3:
- Input: x = 10
- Output: false
- Explanation: Reads 01 from right to left. Therefore it is not a palindrome.
Constraints:
- -231 <= x <= 231 - 1
Follow up: Could you solve it without converting the integer to a string?