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…

esign 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(k…

要求: get(key):如果key在cache中,则返回对应的value值,否则返回null set(key,value):如果key不在cache中,则将该(key,value)插入cache中(注意,如果cache已满,则必须把最近最久未使用的元素从cache中删除):如果key在cache中,则重置value的值. set和get的时间复杂度都是O(1). 两个map /** * 思路:时间复杂度是O(1),一下子想到的是map.但是怎么进行淘汰呢?需要记录时间,且查找的复杂度也是O(1…

http://www.acmerblog.com/leetcode-lru-cache-lru-5745.html acm之家的讲解是在是好,丰富 import java.util.LinkedHashMap; public class LRUCache { private int capacity; private LinkedHashMap<Integer,Integer> map=null; public LRUCache(int capacity) { this.capacity=ca…

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…

题目: 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.…

package lru; import java.util.HashMap; public class LRUCache2<K,V> { public final int capacity; class DNode{ K key; V value; DNode next; DNode pre; public DNode(K key, V value, LRUCache2<K, V>.DNode pre, LRUCache2<K, V>.DNode next) { sup…

Description: 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 r…

设计并实现最近最久未使用(Least Recently Used)缓存. 题目描述: 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 ex…

题目: 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.…