public class Solution
extends Object
1780 - Check if Number is a Sum of Powers of Three\.
Medium
Given an integer `n`, return `true` _if it is possible to represent_ `n` _as the sum of distinct powers of three._ Otherwise, return `false`.
An integer `y` is a power of three if there exists an integer `x` such that y == 3x.
**Example 1:**
**Input:** n = 12
**Output:** true
**Explanation:** 12 = 31 + 32
**Example 2:**
**Input:** n = 91
**Output:** true
**Explanation:** 91 = 30 + 32 + 34
**Example 3:**
**Input:** n = 21
**Output:** false
**Constraints:**
* 1 <= n <= 107