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

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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: - RandomizedCollection() Initializes the empty RandomizedCollection object. - bool insert(int val) Inserts an item val into the multiset, e

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solution.cppC++17

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