970. Powerful Integers

Given three integers x, y, and bound, return a list of all the powerful integers that have a value less than or equal to bound. An integer is powerful if it can be represented as xi + yj for some integers i >= 0 and j >= 0. You may return the answer in any order. In your answer, each value should occur at most once. Example 1: Input: x = 2, y = 3, bound = 10 Output: [2,3,4,5,7,9,10] Explanat