Leetcode | 1780. Check if Number is a Sum of Powers of Three | Math

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Understanding the Intuition behind a simple medium-rated math problem.

Video 7 of the POTD series.

Let's understand the logic together. Observe how breaking the problem into simpler parts really eases the solution for us. It just requires us to go a bit slow and think deeply.

Key takeaway:
1.An important observation is that we never need to use a power of 3 larger than the given integer n, since that would immediately make the sum greater than n. Since n can be as large as 10^7 , the largest power of 3 we need to check is around 3^15 .

#youcanlearnanything #problemsolving #math
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