Module leetcode_rust::problems::p000_0xx::p000_007

Problem #7 Reverse Integer

Description

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:

• $-2^{31} \leqslant x \leqslant 2^{31} - 1$

Source: https://leetcode.com/problems/reverse-integer/description/

Functions

reverse_integer

Reverse an integer (32-bit long) and check for overflow.