problem.md

1780. Check if Number is a Sum of Powers of Three [Rating: 1505.82]

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 == 3^x.

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