LeetCode - 150 - Reverse Integer

Wed, 01 Jul 2026 08:37:18 +0300

The problem

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 [-2^31, 2^31 - 1], then return 0.

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

Example 1:

Input: x = 123
Output: 321

Example 2:

Input: x = -123
Output: -321

Example 3:

Input: x = 120
Output: 21

Constraints:

Bit_Manipulation on Dmytro's Blog

LeetCode - 150 - Reverse Integer

The problem