LeetCode 9. Palindrome Number

Question

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

 

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Solution

Python

class Solution:
    def isPalindrome(self, x: int) -> bool:
        original_list = list(str(x))
        new_list = list(str(x))
        new_list.reverse()
        if original_list == new_list:
            return True
        return False

Java