Easy

Quiz

#326 Power of Three

APPROACH

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 == 3^x.

Example 1:

Input: n = 27

Output: true

Explanation: 27 = 33

Example 2:

Input: n = 0

Output: false

Explanation: There is no x where 3x = 0.

Example 3:

Input: n = -1

Output: false

Explanation: There is no x where 3x = (-1).

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What is the optimal approach for this problem?