# 0970. Powerful Integers

https://leetcode.com/problems/powerful-integers

## Description

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]
**Explanation:**
2 = 20 + 30
3 = 21 + 30
4 = 20 + 31
5 = 21 + 31
7 = 22 + 31
9 = 23 + 30
10 = 20 + 32
```

**Example 2:**

```
**Input:** x = 3, y = 5, bound = 15
**Output:** [2,4,6,8,10,14]
```

**Constraints:**

* `1 <= x, y <= 100`
* `0 <= bound <= 106`

## ac

```java
```
