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g0001_0100.s0007_reverse_integer.readme.md Maven / Gradle / Ivy

7\. Reverse Integer

Medium

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).**

**Example 1:**

**Input:** x = 123

**Output:** 321 

**Example 2:**

**Input:** x = -123

**Output:** -321 

**Example 3:**

**Input:** x = 120

**Output:** 21 

**Example 4:**

**Input:** x = 0

**Output:** 0 

**Constraints:**

*   -231 <= x <= 231 - 1