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---
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comments: true
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glightbox: false
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hide:
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- footer
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---
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<h1 align="center"> </h1>
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<p align="center">
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<img src="index.assets/conceptual_rendering.png" width="200">
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<img src="index.assets/hello_algo_mindmap_tp.png" width="320">
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</p>
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<h2 align="center"> 《 Hello 算法 》</h2>
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<p align="center"> 动画图解、一键运行的数据结构与算法教程 </p>
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<p align="center">
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<a href="https://github.com/krahets/hello-algo">
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<img alt="GitHub repo stars" src="https://img.shields.io/github/stars/krahets/hello-algo?style=social&link=https%3A%2F%2Fgithub.com%2Fkrahets%2Fhello-algo">
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</a>
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<a href="https://github.com/krahets/hello-algo/releases">
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<img alt="GitHub all releases" src="https://img.shields.io/github/downloads/krahets/hello-algo/total?style=social&logo=gitbook&logoColor=black&label=Downloads">
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</a>
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<a href="https://github.com/krahets/hello-algo">
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<img alt="GitHub contributors" src="https://img.shields.io/github/contributors-anon/krahets/hello-algo?style=social&logo=git&logoColor=%23101010">
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</a>
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</p>
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<p align="center">
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<img src="https://img.shields.io/badge/Python-snow?logo=python&logoColor=3776AB">
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<img src="https://img.shields.io/badge/C%2B%2B-snow?logo=c%2B%2B&logoColor=00599C">
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<img src="https://img.shields.io/badge/Java-snow?logo=coffeescript&logoColor=FC4C02">
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<img src="https://img.shields.io/badge/C%23-snow?logo=csharp&logoColor=512BD4">
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<img src="https://img.shields.io/badge/Go-snow?logo=go&logoColor=00ADD8">
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<img src="https://img.shields.io/badge/Swift-snow?logo=swift&logoColor=F05138">
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<img src="https://img.shields.io/badge/JavaScript-snow?logo=javascript&logoColor=E9CE30">
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<img src="https://img.shields.io/badge/TypeScript-snow?logo=typescript&logoColor=3178C6">
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<img src="https://img.shields.io/badge/Dart-snow?logo=dart&logoColor=0175C2">
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<img src="https://img.shields.io/badge/Rust-snow?logo=rust&logoColor=000000">
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<img src="https://img.shields.io/badge/C-snow?logo=c&logoColor=A8B9CC">
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<img src="https://img.shields.io/badge/Zig-snow?logo=zig&logoColor=F7A41D">
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<img src="https://img.shields.io/badge/Stay%20Tuned-snow">
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</p>
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---
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<h2 align="center"> 推荐语 </h2>
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!!! quote
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“一本通俗易懂的数据结构与算法入门书,引导读者手脑并用地学习,强烈推荐算法初学者阅读。”
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**—— 邓俊辉,清华大学计算机系教授**
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!!! quote
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“如果我当年学数据结构与算法的时候有《Hello 算法》,学起来应该会简单 10 倍!”
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**—— 李沐,亚马逊资深首席科学家**
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---
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<h3 align="center"> 全书动画图解 </h3>
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<p align="center"> 内容清晰易懂、学习曲线平滑</br>电脑、平板、手机全终端阅读 </p>
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![algorithm_animation](index.assets/animation.gif)
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!!! quote ""
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<p align="center"> "A picture is worth a thousand words." </p>
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<p align="center"> “一图胜千言” </p>
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---
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<h3 align="center"> 代码一键运行 </h3>
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<p align="center"> 提供各个算法与数据结构的简洁实现与测试样例,皆可直接运行</br>支持 Python、C++、Java、C#、Go、Swift、JS、TS、Dart、Rust、C、Zig 等语言 </p>
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![running_code](index.assets/running_code.gif)
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!!! quote ""
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<p align="center"> "Talk is cheap. Show me the code." </p>
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<p align="center"> “少吹牛,看代码” </p>
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---
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<h3 align="center"> 可讨论与提问 </h3>
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<p align="center"> 鼓励小伙伴们互帮互助、共同成长</br>提问与评论一般能在两日内得到回复 </p>
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![comment](index.assets/comment.gif)
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!!! quote ""
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<p align="center"> “追风赶月莫停留,平芜尽处是春山” </p>
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<p align="center"> 一起加油! </p>
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---
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<h2 align="center"> 序 </h2>
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两年前,我在力扣上分享了《剑指 Offer》系列题解,受到了许多同学的喜爱和支持。在与读者的交流期间,最常收到的一个问题是“如何入门学习算法”。我逐渐对这个问题产生了浓厚的兴趣。
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两眼一抹黑地刷题似乎是最受欢迎的方法,简单直接且有效。刷题就如同玩“扫雷”游戏,自学能力强的同学能够顺利地将地雷逐个排掉,而基础不足的同学很可能被炸的满头是包,并在挫折中步步退缩。通读教材书籍也是一种常见做法,但对于面向求职的同学来说,毕业季、投递简历、准备笔试面试已经占据了大部分精力,厚重的书籍往往变成了一项艰巨的挑战。
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如果你也面临类似的困扰,那么很幸运这本书找到了你。本书是我对此问题的给出的答案,即使不是最优解,也至少是一次积极的尝试。这本书虽然不足以让你直接拿到 Offer ,但会引导你探索数据结构与算法的“知识地图”,带你了解不同“地雷”的形状大小和分布位置,让你掌握各种“排雷方法”。有了这些本领,相信你可以更加自如地应对刷题和阅读文献,逐步构建起完整的知识体系。
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我深深赞同费曼先生所言:“Knowledge isn't free. You have to pay attention.”从这个意义上看,这本书并非完全“免费”。为了不辜负你为本书所付出的宝贵“注意力”,我会尽我所能,投入最大的“注意力”来完成这本书的创作。
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<h3 align="left"> 作者简介 </h3>
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靳宇栋 ([Krahets](https://leetcode.cn/u/jyd/)),大厂高级算法工程师,上海交通大学硕士。力扣(LeetCode)全网阅读量最高博主,发表的[《图解算法数据结构》](https://leetcode.cn/leetbook/detail/illustration-of-algorithm/)已被订阅 27 万本。
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---
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<h2 align="center"> 致谢 </h2>
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本书在开源社区众多贡献者的共同努力下不断成长。感谢每一位投入时间与精力的撰稿人,是他们的无私奉献使这本书变得更好,他们是(按照 GitHub 自动生成的顺序排列):
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<p align="center">
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<a href="https://github.com/krahets/hello-algo/graphs/contributors">
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<img width="550" src="https://contrib.rocks/image?repo=krahets/hello-algo" />
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</a>
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</p>
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本书的代码审阅工作由 Gonglja, gvenusleo, justin‐tse, krahets, night-cruise, nuomi1, Reanon, sjinzh 完成(按照首字母顺序排列)。感谢他们付出的时间与精力,正是他们确保了各语言代码的规范与统一。
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<div class="center-table">
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<table>
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<tbody>
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<td align="center"><a href="https://github.com/Gonglja"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/39959756?v=4" width="50px;" alt="Gonglja"/><br /><sub><b>Gonglja</b></sub></a><br /><sub>C, C++</sub></td>
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<td align="center"><a href="https://github.com/gvenusleo"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/79075347?v=4" width="50px;" alt="gvenusleo"/><br /><sub><b>gvenusleo</b></sub></a><br /><sub>Dart</sub></td>
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<td align="center"><a href="https://github.com/hpstory"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/33348162?v=4" width="50px;" alt="hpstory"/><br /><sub><b>hpstory</b></sub></a><br /><sub>C#</sub></td>
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<td align="center"><a href="https://github.com/justin-tse"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/24556310?v=4" width="50px;" alt="justin-tse"/><br /><sub><b>justin-tse</b></sub></a><br /><sub>JS, TS</sub></td>
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<td align="center"><a href="https://github.com/krahets"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/26993056?v=4" width="50px;" alt="krahets"/><br /><sub><b>krahets</b></sub></a><br /><sub>Java, Python</sub></td>
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<td align="center"><a href="https://github.com/night-cruise"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/77157236?v=4" width="50px;" alt="night-cruise"/><br /><sub><b>night-cruise</b></sub></a><br /><sub>Rust</sub></td>
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<td align="center"><a href="https://github.com/nuomi1"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/3739017?v=4" width="50px;" alt="nuomi1"/><br /><sub><b>nuomi1</b></sub></a><br /><sub>Swift</sub></td>
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<td align="center"><a href="https://github.com/Reanon"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/22005836?v=4" width="50px;" alt="Reanon"/><br /><sub><b>Reanon</b></sub></a><br /><sub>Go, C</sub></td>
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<td align="center"><a href="https://github.com/sjinzh"><img style="border-radius: 50%;" src="https://avatars.githubusercontent.com/u/99076655?v=4" width="50px;" alt="sjinzh"/><br /><sub><b>sjinzh</b></sub></a><br /><sub>Rust, Zig</sub></td>
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</tbody>
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</table>
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</div>
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---
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