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# 即学即练｜操作系统篇：复习卡 & 算法题特训
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你好，我是微扰君。初三好！
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今天是我们春节特别策划的第三期。
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你可以借助整理好的要点卡片，快速回顾这四大章的要点内容。复习完知识点，当然也需要有对应的LeetCode练习题，供你练手复习巩固，你可以点击必知必会算法题链接，检验一下自己的掌握情况，如果发现自己哪里还不太明白，可以回到相应章节，有针对性地复习。
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## 操作系统篇
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今天我们来复习&练习专栏的第三章，**操作系统篇**。在这个模块里，我们一起学习了调度算法、页面置换算法、日志文件系统这三个内容。
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### 必知必会力扣题
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* 题目名 432. 全O(1) 数据结构
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题目链接：[https://leetcode-cn.com/problems/all-oone-data-structure/](https://leetcode-cn.com/problems/all-oone-data-structure/)
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题解思路：[十字链表，也是 LFU 的常见实现方式](https://leetcode-cn.com/problems/all-oone-data-structure/solution/wei-rao-li-lun-shi-zi-lian-biao-by-wfnus-9cr9/)
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* 题目名 146. LRU 缓存
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题目链接：[https://leetcode-cn.com/problems/all-oone-data-structure/](https://leetcode-cn.com/problems/all-oone-data-structure/)
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题解思路：可以直接参考官方题解，[我用Golang实现了一个基于LRU的分布式缓存](http://github.com/wfnuser/burrow)
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* 题目名 1701. 平均等待时间
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题目链接：[https://leetcode-cn.com/problems/average-waiting-time/solution/](https://leetcode-cn.com/problems/average-waiting-time/solution/)
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题解思路：先来先服务策略
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* 题目名 1166. 设计文件系统
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题目链接：[https://leetcode-cn.com/problems/design-file-system/](https://leetcode-cn.com/problems/design-file-system/)
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题解思路：字典树、哈希表
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### 复习要点卡
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点击要点卡，直达你最需要复习的那篇。
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[](https://time.geekbang.org/column/article/476869)
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[](https://time.geekbang.org/column/article/477414)
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[](https://time.geekbang.org/column/article/478396)
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* * *
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复习&练习的过程中，如果有什么困惑，获得了什么收获，都欢迎你留言讨论。做完题目之后，欢迎你把复习卡和你的LeetCode题解分享给你的朋友。
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学习愉快，我们下期见～
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