# 力扣705. 设计哈希集合


## 力扣705. Design HashSet（设计哈希集合）

设计哈希集合。

示例 1：

![](../posts/01_学习/87_LeetCode/0705_设计哈希集合/img/0705-1-description.png)

```
输入：["MyHashSet","add","add","contains","contains","add","contains","remove","contains"]
     [[],[1],[2],[1],[3],[2],[2],[2],[2]]
输出：[null,null,null,true,false,null,true,false,true]
解释：...
```

提示：
- 0 <= key <= 10^6
- 最多调用 10^4 次 add、remove 和 contains