Question: Describe an efficient multimap structure for storing n entries whose r < n keys have distinct hash codes. Your structure should perform operation getAll in

Describe an efficient multimap structure for storing n entries whose r < n keys have distinct hash codes. Your structure should perform operation getAll in O(1 +s) expected time, where s is the number of entries returned, operation entrySet() in O(n) time, and the remaining operations of the multimap ADT in O(1) expected time.

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