Leetcode - Insert Delete GetRandom O(1) (Python)

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June 2020 Leetcode Challenge
Leetcode - Insert Delete GetRandom O(1)
  1. Timothy H Chang
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Wait, does it work in O(1) time? You get keys from dict, is it O(1)? I guess, this operation takes a lot longer time, like O(n) and it's bad solution for task about O(1) time complexity for all operations. Am i wrong?

eduardsukhavenka
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Would this be accepted in an interview?

edwardteach
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Hi sir,
please explain what is meant by self.items[val] = True in insert function

midhileshmomidi
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