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虽然回溯法很难,很不好理解,但是回溯法并不是什么高效的算法。 | ||
# 第七章 回溯算法part01 | ||
今日内容: | ||
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回溯法解决的问题都可以抽象为树形结构,是的,我指的是所有回溯法的问题都可以抽象为树形结构! | ||
● 理论基础 | ||
● 77. 组合 | ||
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详细布置 | ||
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理论基础 | ||
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其实在讲解二叉树的时候,就给大家介绍过回溯,这次正式开启回溯算法,大家可以先看视频,对回溯算法有一个整体的了解。 | ||
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题目链接/文章讲解:https://programmercarl.com/%E5%9B%9E%E6%BA%AF%E7%AE%97%E6%B3%95%E7%90%86%E8%AE%BA%E5%9F%BA%E7%A1%80.html | ||
视频讲解:https://www.bilibili.com/video/BV1cy4y167mM | ||
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> 虽然回溯法很难,很不好理解,但是回溯法并不是什么高效的算法。 | ||
> 回溯法解决的问题都可以抽象为树形结构,是的,我指的是所有回溯法的问题都可以抽象为树形结构! | ||
## 77. 组合 | ||
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对着 在 回溯算法理论基础 给出的 代码模板,来做本题组合问题,大家就会发现 写回溯算法套路。 | ||
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在回溯算法解决实际问题的过程中,大家会有各种疑问,先看视频介绍,基本可以解决大家的疑惑。 | ||
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本题关于剪枝操作是大家要理解的重点,因为后面很多回溯算法解决的题目,都是这个剪枝套路。 | ||
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题目链接/文章讲解:https://programmercarl.com/0077.%E7%BB%84%E5%90%88.html | ||
视频讲解:https://www.bilibili.com/video/BV1ti4y1L7cv | ||
剪枝操作:https://www.bilibili.com/video/BV1wi4y157er |
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# 第七章 回溯算法part02 | ||
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今日内容: | ||
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● 216.组合总和III | ||
● 17.电话号码的字母组合 | ||
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详细布置 | ||
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## 216.组合总和III | ||
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如果把 组合问题理解了,本题就容易一些了。 | ||
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题目链接/文章讲解:https://programmercarl.com/0216.%E7%BB%84%E5%90%88%E6%80%BB%E5%92%8CIII.html | ||
视频讲解:https://www.bilibili.com/video/BV1wg411873x | ||
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## 17.电话号码的字母组合 | ||
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本题大家刚开始做会有点难度,先自己思考20min,没思路就直接看题解。 | ||
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题目链接/文章讲解:https://programmercarl.com/0017.%E7%94%B5%E8%AF%9D%E5%8F%B7%E7%A0%81%E7%9A%84%E5%AD%97%E6%AF%8D%E7%BB%84%E5%90%88.html | ||
视频讲解:https://www.bilibili.com/video/BV1yV4y1V7Ug | ||
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