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LRU Cache

Hard

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Design and implement LRU cache data structure.

Sample Input:

["LRUCache","put","put","get","put","get","put","get","get","get"], [[2],[1,1],[2,2],[1],[3,3],[2],[4,4],[1],[3],[4]]

Sample Output:

[null,null,null,1,null,-1,null,-1,3,4]

Hints

Hint 1

Use hashmap for O(1) access

Hint 2

Use doubly linked list for order

Hint 3

Move accessed node to front

Code Editor

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