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hows it going everyone welcome to the channel so today im gonna go over the medium design problem called insert delete get random this problem has been asked at a bunch of tech companies including amazon bloomberg facebook twitter and microsoft before i jump into the explanation dont forget to like and subscribe if you like my content it really helps out the channel and lets get into it so for this design problem we have to implement three different functions the first function is called insert this will insert an item val into a set if it is present if the item is not present we return true if it is present then we return false the second function is called remove and exactly how it sounds were going to remove an item val from the set if the item is present we return true if it is not then we return false and the last function that we have to implement is called get random this will return a random element in the current set of elements where each element must have an equal proba