9.py

class Solution:
    def isPalindrome(_, x: int) -> bool:
        return str(x) == str(x)[::-1]

"""
9. Palindrome Number 
Given an integer x, return true if x is palindrome integer.
An integer is a palindrome when it reads the same backward as forward. 
For example, 121 is palindrome while 123 is not.

Example 1:
Input: x = 121
Output: true

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.

Example 4:
Input: x = -101
Output: false
 
Constraints:
-231 <= x <= 231 - 1
"""

# Testcase 

s = Solution()
print(s.isPalindrome(121))  # True
print(s.isPalindrome(-121)) # False
print(s.isPalindrome(10))   # False
print(s.isPalindrome(-101)) # False