题目: Recently, Peter saw the equation x0+2x1+4x2+...+2mxm=nx0+2x1+4x2+...+2mxm=n. He wants to find a solution (x0,x1,x2,...,xm)(x0,x1,x2,...,xm) in suc ...
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其他好文 时间:
2020-04-02 11:55:22
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55
The 2018 World Cup was held recently in Russia. Some great soccer countries (e.g., Italy,Netherlands, Chile, USA) did not qualify for this World Cup. ...
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其他好文 时间:
2020-03-28 10:32:42
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82
1.1 python模拟LRU(Least recently used,最近最少使用) 定义:算法根据数据的历史访问记录来进行淘汰数据,其核心思想是“如果数据最近被访问过,那么将来被访问的几率也更高”。 核心: 1. 每当缓存命中(即缓存数据被访问),则将数据移到链表头部; 2. 当链表满的时候,将 ...
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其他好文 时间:
2020-03-25 01:35:41
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63
1. memcached内部不会监视记录是否过期,而是在get时查看记录的时间戳,检查记录是否过期。 这种技术被称为 惰性过期。因此,memcached不会在过期监视上耗费CPU时间 ,与redis是有区别的. 2. memcached的过期时间,有一个最大时限就是30天,设置时若超过30天,存储时 ...
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系统相关 时间:
2020-03-16 11:17:22
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140
1 """ 2 Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and put. 3 get(key) ...
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系统相关 时间:
2020-03-06 22:05:50
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100
什么是LRU LRU(Least recently used,最近最少使用)算法根据数据的历史访问记录来进行淘汰数据,其核心思想是“如果数据最近被访问过,那么将来被访问的几率也更高” 距离现在最早使用的会被我们替换掉。不够形象的话我们看下面的例子。 size=3的缓存淘汰实现: 在插入元素1的时候, ...
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编程语言 时间:
2020-03-06 15:53:35
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74
Vova promised himself that he would never play computer games... But recently Firestorm — a well-known game developing company — published their newes ...
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其他好文 时间:
2020-02-17 18:10:55
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91
2020 CDUT寒假集训第一场 [TOC] "A Vasya and Golden Ticket" Recently Vasya found a golden ticket — a sequence which consists of n digits a 1 a 2… a n . Vasya c ...
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其他好文 时间:
2020-02-16 01:54:04
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123
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 ...
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系统相关 时间:
2020-02-10 09:57:46
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68
How did vera discover she had this gift of second sight? Several cases have been reported in Russia recently of people who can read and detect colours ...
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其他好文 时间:
2020-02-09 16:23:45
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73