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Solution: Powerful Integers

Explore how to compute all powerful integers less than or equal to a given bound by efficiently combining exponential powers of two numbers and using a hash set for deduplication. Understand the application of nested loops and optimization techniques to solve this problem with attention to time and space complexity.

Statement

Given three integers x, y, and bound, return a list of all powerful integers whose value is less than or equal to bound.

An integer is considered powerful if it can be expressed as xi^i + yj^j for some non negative integers ii and jj (i.e., i0i \geq 0 and j0j ...