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Palindrome Number | CodeTutor

Palindrome Number

Easy

Math Two Pointers

Problem

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

A palindrome is a number that reads the same backward as forward. For example, 121 is a palindrome while 123 is not.

Constraints

-2^31 <= x <= 2^31 - 1

Examples

Input: x = 121

Output: true

121 reads as 121 from left to right and from right to left.

Input: x = -121

Output: false

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

Reads 01 from right to left. Therefore it is not a palindrome.

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