How to Solve Insert Delete GetRandom O(1) - Duplicates allowed Problem
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Insert Delete GetRandom O(1) - Duplicates allowed
RandomizedCollection is a data structure that contains a collection of numbers, possibly duplicates (i.e., a multiset). It should support inserting and removing specific elements and also reporting a random element. Implement the RandomizedCollection class: You must implement the functions of the class such that each function works on average O(1) time complexity. Note: The test cases are generated such that getRandom will only be called if there is at least one item in the RandomizedCollection.
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Problem Statement
RandomizedCollection is a data structure that contains a collection of numbers, possibly duplicates (i.e., a multiset). It should support inserting and removing specific elements and also reporting a random element. Implement the RandomizedCollection class: You must implement the functions of the class such that each function works on average O(1) time complexity. Note: The test cases are generated such that getRandom will only be called if there is at least one item in the RandomizedCollection.
Insert Delete GetRandom O(1) - Duplicates allowed
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Solve Insert Delete GetRandom O(1) - Duplicates allowed — RandomizedCollection is a data structure that contains a collection of numbers, ...
Here's the optimal approach using Array:
Time: O(n) | Space: O(n)
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