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Reverse Integer

Problem Statement​

Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0.

Assume the environment does not allow you to store 64-bit integers (signed or unsigned).

Leetcode Link

Example 1:​

Input: x = 123
Output: 321

Example 2:​

Input: x = -123
Output: -321

Example 3:​

Input: x = 120
Output: 21

Constraints:​

  • -231 <= x <= 231 - 1

Code​

Python Code

class Solution:
    def reverse(self, x: int) -> int:
        rev = int(str(abs(x))[::-1])
        return (-rev if x < 0 else rev) if rev.bit_length() < 32 else 0