Design LRU Cache Data Sturcture | LeetCode 146. LRU Cache | Least Recently Used Cache (LRU Cache)
📝Statement: Design a data structure that follows the constraints of a Least Recently Used (LRU) cache.Implement the LRUCache class: # LRUCache(int capacity) Initialize the LRU cache with positive size capacity.
int get(int key) Return the value of the key if the key exists, otherwise return -1.
void put(int key, int value) Update the value of the key if the key exists. Otherwise, add the key-value pair to the cache. If the number of keys exceeds the capacity from this operation, evict the least recently used key.
Follow up:Could you do get and put in O(1) time complexity?
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