Can A Number Be Represented As Sum Of Powers Of Three?
n can be sum of distinct powers of 3 if ternary rep only contains 0 & 1. Convert n to base 3, check for digit 2. If found, return false. Otherwise, true.
1780. Check if Number is a Sum of Powers of Three Difficulty: Medium Topics: Math 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 Hint: Let's note that the maximum power of 3 you'll use in your soln is 3^16 The number can not be...