Leetcode Problem 326. Power of Three

326. Power of Three

Leetcode Solutions

Check if n is less than 1. If it is, return false because powers of three are positive numbers.
Calculate 3^19 which is the largest power of three that fits in an integer.
Check if 3^19 modulo n is 0. If it is, n is a divisor of 3^19 and thus a power of three.
Return true if the modulo is 0, otherwise return false.

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