题目标签:HashMap 题目让我们设计一个 hashset,有add,contains,remove 功能. 建立一个boolean array,index 是数字的值,具体看code. Java Solution: Runtime: 58 ms, faster than 90.21% Memory Usage: 56.3 MB, less than 68.53% 完成日期:03/18/2019 关键点:boolean array class MyHashSet { boolean [] se…