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g0301_0400.s0326_power_of_three.readme.md Maven / Gradle / Ivy

326\. Power of Three

Easy

Given an integer `n`, return _`true` if it is a power of three. Otherwise, return `false`_.

An integer `n` is a power of three, if there exists an integer `x` such that n == 3x.

**Example 1:**

**Input:** n = 27

**Output:** true 

**Example 2:**

**Input:** n = 0

**Output:** false 

**Example 3:**

**Input:** n = 9

**Output:** true 

**Constraints:**

*   -231 <= n <= 231 - 1

**Follow up:** Could you solve it without loops/recursion?