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You manage an e-commerce website and need to keep track of the last N order IDs in a log. Design a data structure that supports the following operations efficiently:
February 6, 2025 | Data Structure, dsa, Twitter | No comments
You are given a stream of elements that is too large to fit into memory. Write an algorithm to select a random element from the stream with equal probability
Build an autocomplete system that, given a query string s and a set of possible query strings returns all strings from the set that start with s as a prefix.