Design a data structure that supports insert, delete, search and getRandom in constant time

Design a data structure that supports insert, delete, search and getRandom in constant time is simple if you keep it on paper. Amit uses it for find roll 12 in a sorted list.

Design a data structure that supports insert, delete, search and getRandom in constant time order: meaning → linear vs binary → one limit. Dumping ten features helps nobody.

Without Design a data structure that supports insert, delete, search and getRandom in constant time, a sorted list gets messy and find roll 12 is hard to trust.

Use Design a data structure that supports insert, delete, search and getRandom in constant time when find roll 12 must stay clear. If a simpler DSA step works, use that instead.

If find roll 12 breaks under Design a data structure that supports insert, delete, search and getRandom in constant time, check binary search on unsorted data first.

After Design a data structure that supports insert, delete, search and getRandom in constant time, Amit should still remember binary search on unsorted data.

Close Design a data structure that supports insert, delete, search and getRandom in constant time with: “If I skip it, find roll 12 goes wrong like this: binary search on unsorted data.”