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Problems

LRU Cache

Problem

Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set.

  • get(key): Get the value (will always be positive) of the key if the key exists in the cache, otherwise return -1.
  • set(key, value): Set or insert the value if the key is not already present. When the cache reached its capacity, it should invalidate the least recently used item before inserting a new item.

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