How to Solve Insert Delete Get Random O(1) Problem
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Insert Delete GetRandom O(1)
Implement the RandomizedSet class: RandomizedSet() Initializes the RandomizedSet object. bool insert(int val) Inserts an item val into the set if not present. Returns true if the item was not present,...
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Understanding the Insert Delete Get Random O(1) Problem
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Problem Statement
Implement the RandomizedSet class: RandomizedSet() Initializes the RandomizedSet object. bool insert(int val) Inserts an item val into the set if not present. Returns true if the item was not present, false otherwise. bool remove(int val) Removes an item val from the set if present. Returns true if the item was present, false otherwise. int getRandom() Returns a random element from the current set of elements (it's guaranteed that at least one element exists when this method is called). Each element must have the same probability of being returned. You must implement the functions of the class such that each function works in average O(1) time complexity.
Insert Delete GetRandom O(1)
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Example inputExample outputConstraints
231 <= val <= 231 - 1At most 2 * 105 calls will be made to insert, remove, and getRandom.There will be at least one element in the data structure when getRandom is called.How Interview Coder Helps with Leetcode Problems
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