Palindrome Number

Palindrome Number

LeetCode Problem

• Problem Number: 9
• Problem Link: https://leetcode.com/problems/palindrome-number/
• Difficulty: Easy
• Topics: Math

Problem Description

Given an integer x, return true if x is a palindrome, and false otherwise.

A palindrome is a number that reads the same forwards and backwards.

Examples

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?

Hints

Beware of overflow when you reverse the integer.