LRU LRU Links https://blog.csdn.net/kuizhu7142/article/details/81115750 https://github.com/labuladong/fucking-algorithm/blob/master/%E9%AB%98%E9%A2%91%E9%9D%A2%E8%AF%95%E7%B3%BB%E5%88%97/LRU%E7%AE%97%E6%B3%95.md 层层拆解，带你手写 LRU 算法 下一页 多级反馈队列
