【380. Insert Delete GetRandom O(1)】的更多相关文章

LeetCode 380. Insert Delete GetRandom O(1)

380. Insert Delete GetRandom O(1) Add to List Description Submission Solutions Total Accepted: 21771 Total Submissions: 56175 Difficulty: Medium Contributors: Admin Design a data structure that supports all following operations in average O(1) time.…

leetcode 380. Insert Delete GetRandom O(1) 、381. Insert Delete GetRandom O(1) - Duplicates allowed

380. Insert Delete GetRandom O(1) 实现插入.删除.获得随机数功能,且时间复杂度都在O(1).实际上在插入.删除两个功能中都包含了查找功能,当然查找也必须是O(1). 数组可以实现插入.删除.获得随机数O(1),但查找就不行了.(当然对于数组,直接删除的时间复杂度不是O(1),因为可能需要移动) hash.set都是红黑树实现的,查找.插入.删除的时间复杂度在O(logn). unordered_map.unordered_set是哈希表实现的,查找.插入.删除的…

【LeetCode】380. Insert Delete GetRandom O(1) 解题报告（Python）

[LeetCode]380. Insert Delete GetRandom O(1) 解题报告(Python) 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址:https://leetcode.com/problems/insert-delete-getrandom-o1/description/ 题目描述: Design a data structure that supports all following oper…

[LeetCode] 380. Insert Delete GetRandom O(1) 常数时间内插入删除和获得随机数

Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. getRandom: Returns a random element fro…

[LeetCode] 380. Insert Delete GetRandom O(1) 插入删除获得随机数O(1)时间

Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. getRandom: Returns a random element fro…

[leetcode]380. Insert Delete GetRandom O(1)常数时间插入删除取随机值

Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. getRandom: Returns a random element fro…

LeetCode 380. Insert Delete GetRandom O(1) （插入删除和获得随机数 常数时间）

Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. getRandom: Returns a random element fro…

380. Insert Delete GetRandom O(1) 设计数据结构：在1的时间内插入、删除、产生随机数

［抄题］: Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. getRandom: Returns a random eleme…

LeetCode 380. Insert Delete GetRandom O(1) 常数时间插入、删除和获取随机元素(C++/Java)

题目: Design a data structure that supports all following operations in averageO(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. getRandom: Returns a random element…

[LC] 380. Insert Delete GetRandom O(1)

Design a data structure that supports all following operations in average O(1) time. insert(val): Inserts an item val to the set if not already present. remove(val): Removes an item val from the set if present. getRandom: Returns a random element fro…