cache.put(3, 3); // 该操作会使得key 2 作废 cache.get(2); // 返回 -1 (未找到) cache.put(4, 4); // 该操作会使得key 1 作废 cache.get(1); // 返回 -1 (未找到) cache.get(3); // 返回 3 cache.get(4); // 返回 4 本题在LeetCode上在Design分类下 方法一:双向链表队列实现...
1. Leetcode LRU cache Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and put. get(key) - Get the value (will always be positive) of the key if the key exists in the cache, otherwise return -1.put(key, value...
请你设计并实现一个满足LRU (最近最少使用) 缓存约束的数据结构。 实现LRUCache类: LRUCache(int capacity)以正整数作为容量capacity初始化 LRU 缓存 int get(int key)如果关键字key存在于缓存中,则返回关键字的值,否则返回-1。 void put(int key, int value)如果关键字key已经存在,则变更其数据值value;如果...
// an element with a duplicate key is inserted, or on destruction of the cache. // // The cache keeps two linked lists of items in the cache. All items in the // cache are in one list or the other, and never both. Items still referenced // by clients but erased from the cache...
LeetCode 中有一道相应LRU缓存算法的题目,感兴趣可以做一做: lru-cache 理论 根据wiki的LRU缓存结构介绍,可以了解到缓存的基本淘汰策略过程,比如下面这张图的节点淘汰过程: 读取的顺序为A B C D E D F,缓存大小为 4,括号内的数字表示排序,数字越小越靠后,表示Least recently. ...
链接:http://leetcode.com/problems/lru-cache/ 5/14/2017 准备面试 用hashmap + double linkedlist实现,hashmap里key是key, value是double linkedlist里面的node节点 注意的问题: 1. 最好不用系统的Deque来做double linkedlist,不容易储存node 2. double linkedlist里的node包括key, value, prev, next ...
https://leetcode.com/problems/lru-cache/ Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations:getandset. get(key)- Get the value (will always be positive) of the key if the key exists in the cache, otherwise return -1. ...
LeetCode 中有一道相应LRU缓存算法的题目,感兴趣可以做一做: lru-cache 理论 根据wiki的LRU缓存结构介绍,可以了解到缓存的基本淘汰策略过程,比如下面这张图的节点淘汰过程: 读取的顺序为 A B C D E D F,缓存大小为 4,括号内的数字表示排序,数字越小越靠后,表示 Least recently...
LRU算法源码可参考Leetcode:https://www.programcreek.com/2013/03/leetcode-lru-cache-java/ 。 # LRU 算法 底层结构 伪代码,公众号 zxiaofan class Node{ int key; int value; Node prev; Node next; } class LRUCache { Node head; Node tail; ...
代码 // A C program to show implementation of LRU cache#include<stdio.h>#include<stdlib.h>// A Queue Node (Queue is implemented using Doubly Linked List)typedefstructQNode{structQNode*prev,*next;unsignedpageNumber;// the page number stored in this QNode}QNode;// A Queue (A FIFO colle...