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<title>7.1. 二叉树(Binary Tree) - Hello 算法</title>
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<title>7.1. 二叉树(Binary Tree) - Hello 算法</title>
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@@ -111,7 +111,7 @@
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<div class="md-header__topic" data-md-component="header-topic">
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<span class="md-ellipsis">
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7.1. 二叉树(Binary Tree)
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7.1. 二叉树(Binary Tree)
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</span>
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</div>
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@@ -268,14 +268,14 @@
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<label class="md-nav__link" for="__nav_1" id="__nav_1_label" tabindex="0">
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0. 写在前面
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0. 写在前面
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||||
<span class="md-nav__icon md-icon"></span>
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||||
</label>
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||||
|
||||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_1_label" aria-expanded="false">
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||||
<label class="md-nav__title" for="__nav_1">
|
||||
<span class="md-nav__icon md-icon"></span>
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||||
0. 写在前面
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0. 写在前面
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</label>
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||||
<ul class="md-nav__list" data-md-scrollfix>
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||||
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||||
@@ -286,7 +286,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_preface/about_the_book/" class="md-nav__link">
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0.1. 关于本书
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0.1. 关于本书
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</a>
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||||
</li>
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||||
|
||||
@@ -300,7 +300,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_preface/suggestions/" class="md-nav__link">
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0.2. 如何使用本书
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0.2. 如何使用本书
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</a>
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||||
</li>
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||||
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||||
@@ -314,7 +314,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_preface/installation/" class="md-nav__link">
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0.3. 编程环境安装
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0.3. 编程环境安装
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</a>
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</li>
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||||
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@@ -328,7 +328,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_preface/contribution/" class="md-nav__link">
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0.4. 一起参与创作
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0.4. 一起参与创作
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</a>
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</li>
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@@ -367,14 +367,14 @@
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<label class="md-nav__link" for="__nav_2" id="__nav_2_label" tabindex="0">
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1. 引言
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1. 引言
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<span class="md-nav__icon md-icon"></span>
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</label>
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||||
|
||||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_2_label" aria-expanded="false">
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||||
<label class="md-nav__title" for="__nav_2">
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<span class="md-nav__icon md-icon"></span>
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1. 引言
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1. 引言
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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@@ -385,7 +385,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_introduction/algorithms_are_everywhere/" class="md-nav__link">
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1.1. 算法无处不在
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1.1. 算法无处不在
|
||||
</a>
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||||
</li>
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||||
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@@ -399,7 +399,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_introduction/what_is_dsa/" class="md-nav__link">
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1.2. 算法是什么
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1.2. 算法是什么
|
||||
</a>
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||||
</li>
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||||
@@ -444,14 +444,14 @@
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<label class="md-nav__link" for="__nav_3" id="__nav_3_label" tabindex="0">
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2. 计算复杂度
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2. 计算复杂度
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<span class="md-nav__icon md-icon"></span>
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||||
</label>
|
||||
|
||||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_3_label" aria-expanded="false">
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<label class="md-nav__title" for="__nav_3">
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<span class="md-nav__icon md-icon"></span>
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2. 计算复杂度
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2. 计算复杂度
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
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||||
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||||
@@ -462,7 +462,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_computational_complexity/performance_evaluation/" class="md-nav__link">
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2.1. 算法效率评估
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2.1. 算法效率评估
|
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</a>
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</li>
|
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||||
@@ -476,7 +476,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_computational_complexity/time_complexity/" class="md-nav__link">
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2.2. 时间复杂度
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2.2. 时间复杂度
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</a>
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</li>
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@@ -490,7 +490,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_computational_complexity/space_complexity/" class="md-nav__link">
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2.3. 空间复杂度
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2.3. 空间复杂度
|
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</a>
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</li>
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@@ -504,7 +504,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_computational_complexity/space_time_tradeoff/" class="md-nav__link">
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2.4. 权衡时间与空间
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2.4. 权衡时间与空间
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</a>
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</li>
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@@ -518,7 +518,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_computational_complexity/summary/" class="md-nav__link">
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2.5. 小结
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2.5. 小结
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||||
</a>
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</li>
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@@ -559,14 +559,14 @@
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<label class="md-nav__link" for="__nav_4" id="__nav_4_label" tabindex="0">
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3. 数据结构简介
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3. 数据结构简介
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
</label>
|
||||
|
||||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_4_label" aria-expanded="false">
|
||||
<label class="md-nav__title" for="__nav_4">
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
3. 数据结构简介
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3. 数据结构简介
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</label>
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||||
<ul class="md-nav__list" data-md-scrollfix>
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@@ -577,7 +577,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_data_structure/data_and_memory/" class="md-nav__link">
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3.1. 数据与内存
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3.1. 数据与内存
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -591,7 +591,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_data_structure/classification_of_data_structure/" class="md-nav__link">
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3.2. 数据结构分类
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||||
3.2. 数据结构分类
|
||||
</a>
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||||
</li>
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||||
|
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@@ -605,7 +605,7 @@
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<li class="md-nav__item">
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||||
<a href="../../chapter_data_structure/summary/" class="md-nav__link">
|
||||
3.3. 小结
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||||
3.3. 小结
|
||||
</a>
|
||||
</li>
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||||
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<label class="md-nav__link" for="__nav_5" id="__nav_5_label" tabindex="0">
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4. 数组与链表
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4. 数组与链表
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
</label>
|
||||
|
||||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_5_label" aria-expanded="false">
|
||||
<label class="md-nav__title" for="__nav_5">
|
||||
<span class="md-nav__icon md-icon"></span>
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||||
4. 数组与链表
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4. 数组与链表
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</label>
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||||
<ul class="md-nav__list" data-md-scrollfix>
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||||
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||||
@@ -666,7 +666,7 @@
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<li class="md-nav__item">
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||||
<a href="../../chapter_array_and_linkedlist/array/" class="md-nav__link">
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4.1. 数组(Array)
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||||
4.1. 数组(Array)
|
||||
</a>
|
||||
</li>
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||||
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<li class="md-nav__item">
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<a href="../../chapter_array_and_linkedlist/linked_list/" class="md-nav__link">
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4.2. 链表(LinkedList)
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4.2. 链表(LinkedList)
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../chapter_array_and_linkedlist/list/" class="md-nav__link">
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4.3. 列表(List)
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4.3. 列表(List)
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../chapter_array_and_linkedlist/summary/" class="md-nav__link">
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4.4. 小结
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4.4. 小结
|
||||
</a>
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||||
</li>
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<label class="md-nav__link" for="__nav_6" id="__nav_6_label" tabindex="0">
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5. 栈与队列
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5. 栈与队列
|
||||
<span class="md-nav__icon md-icon"></span>
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||||
</label>
|
||||
|
||||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_6_label" aria-expanded="false">
|
||||
<label class="md-nav__title" for="__nav_6">
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
5. 栈与队列
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5. 栈与队列
|
||||
</label>
|
||||
<ul class="md-nav__list" data-md-scrollfix>
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||||
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<li class="md-nav__item">
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<a href="../../chapter_stack_and_queue/stack/" class="md-nav__link">
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5.1. 栈(Stack)
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5.1. 栈(Stack)
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</a>
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</li>
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<li class="md-nav__item">
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<a href="../../chapter_stack_and_queue/queue/" class="md-nav__link">
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5.2. 队列(Queue)
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5.2. 队列(Queue)
|
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</a>
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</li>
|
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<li class="md-nav__item">
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<a href="../../chapter_stack_and_queue/deque/" class="md-nav__link">
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5.3. 双向队列(Deque)
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5.3. 双向队列(Deque)
|
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</a>
|
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</li>
|
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<li class="md-nav__item">
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<a href="../../chapter_stack_and_queue/summary/" class="md-nav__link">
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5.4. 小结
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5.4. 小结
|
||||
</a>
|
||||
</li>
|
||||
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<label class="md-nav__link" for="__nav_7" id="__nav_7_label" tabindex="0">
|
||||
6. 散列表
|
||||
6. 散列表
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
</label>
|
||||
|
||||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_7_label" aria-expanded="false">
|
||||
<label class="md-nav__title" for="__nav_7">
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
6. 散列表
|
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6. 散列表
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</label>
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<ul class="md-nav__list" data-md-scrollfix>
|
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@@ -870,7 +870,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_hashing/hash_map/" class="md-nav__link">
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6.1. 哈希表(HashMap)
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6.1. 哈希表(HashMap)
|
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</a>
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</li>
|
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<li class="md-nav__item">
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<a href="../../chapter_hashing/hash_collision/" class="md-nav__link">
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6.2. 哈希冲突处理
|
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6.2. 哈希冲突处理
|
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</a>
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</li>
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@@ -898,7 +898,7 @@
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<li class="md-nav__item">
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<a href="../../chapter_hashing/summary/" class="md-nav__link">
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6.3. 小结
|
||||
6.3. 小结
|
||||
</a>
|
||||
</li>
|
||||
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||||
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||||
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<label class="md-nav__link" for="__nav_8" id="__nav_8_label" tabindex="0">
|
||||
7. 二叉树
|
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7. 二叉树
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
</label>
|
||||
|
||||
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_8_label" aria-expanded="true">
|
||||
<label class="md-nav__title" for="__nav_8">
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
7. 二叉树
|
||||
7. 二叉树
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||||
</label>
|
||||
<ul class="md-nav__list" data-md-scrollfix>
|
||||
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||||
@@ -972,12 +972,12 @@
|
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||||
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||||
<label class="md-nav__link md-nav__link--active" for="__toc">
|
||||
7.1. 二叉树(Binary Tree)
|
||||
7.1. 二叉树(Binary Tree)
|
||||
<span class="md-nav__icon md-icon"></span>
|
||||
</label>
|
||||
|
||||
<a href="./" class="md-nav__link md-nav__link--active">
|
||||
7.1. 二叉树(Binary Tree)
|
||||
7.1. 二叉树(Binary Tree)
|
||||
</a>
|
||||
|
||||
|
||||
@@ -997,24 +997,24 @@
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<li class="md-nav__item">
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<a href="#711" class="md-nav__link">
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7.1.1. 二叉树常见术语
|
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7.1.1. 二叉树常见术语
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#712" class="md-nav__link">
|
||||
7.1.2. 二叉树基本操作
|
||||
7.1.2. 二叉树基本操作
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#713" class="md-nav__link">
|
||||
7.1.3. 常见二叉树类型
|
||||
7.1.3. 常见二叉树类型
|
||||
</a>
|
||||
|
||||
<nav class="md-nav" aria-label="7.1.3. 常见二叉树类型">
|
||||
<nav class="md-nav" aria-label="7.1.3. 常见二叉树类型">
|
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<ul class="md-nav__list">
|
||||
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||||
<li class="md-nav__item">
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@@ -1052,14 +1052,14 @@
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<li class="md-nav__item">
|
||||
<a href="#714" class="md-nav__link">
|
||||
7.1.4. 二叉树的退化
|
||||
7.1.4. 二叉树的退化
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#715" class="md-nav__link">
|
||||
7.1.5. 二叉树表示方式 *
|
||||
7.1.5. 二叉树表示方式 *
|
||||
</a>
|
||||
|
||||
</li>
|
||||
@@ -1080,7 +1080,7 @@
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<li class="md-nav__item">
|
||||
<a href="../binary_tree_traversal/" class="md-nav__link">
|
||||
7.2. 二叉树遍历
|
||||
7.2. 二叉树遍历
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1094,7 +1094,7 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../binary_search_tree/" class="md-nav__link">
|
||||
7.3. 二叉搜索树
|
||||
7.3. 二叉搜索树
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1108,7 +1108,7 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../avl_tree/" class="md-nav__link">
|
||||
7.4. AVL 树 *
|
||||
7.4. AVL 树 *
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1122,7 +1122,7 @@
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||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../summary/" class="md-nav__link">
|
||||
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|
||||
7.5. 小结
|
||||
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|
||||
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|
||||
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||||
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|
||||
|
||||
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||||
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|
||||
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||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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||||
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|
||||
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|
||||
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||||
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||||
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||||
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|
||||
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|
||||
8.1. 堆(Heap)
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||||
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|
||||
</a>
|
||||
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||||
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||||
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|
||||
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||||
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||||
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||||
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|
||||
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||||
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||||
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|
||||
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||||
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||||
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|
||||
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||||
9. 图
|
||||
9. 图
|
||||
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||||
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|
||||
|
||||
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|
||||
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||||
<a href="../../chapter_graph/graph/" class="md-nav__link">
|
||||
9.1. 图(Graph)
|
||||
9.1. 图(Graph)
|
||||
</a>
|
||||
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|
||||
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||||
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||||
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||||
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||||
9.2. 图基础操作
|
||||
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|
||||
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|
||||
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||||
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||||
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||||
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||||
<li class="md-nav__item">
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||||
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|
||||
9.3. 图的遍历
|
||||
9.3. 图的遍历
|
||||
</a>
|
||||
</li>
|
||||
|
||||
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||||
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||||
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||||
<label class="md-nav__link" for="__nav_11" id="__nav_11_label" tabindex="0">
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10. 查找算法
|
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10. 查找算法
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||||
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||||
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|
||||
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||||
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|
||||
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|
||||
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|
||||
10. 查找算法
|
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10. 查找算法
|
||||
</label>
|
||||
<ul class="md-nav__list" data-md-scrollfix>
|
||||
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||||
|
||||
<li class="md-nav__item">
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||||
<a href="../../chapter_searching/linear_search/" class="md-nav__link">
|
||||
10.1. 线性查找
|
||||
10.1. 线性查找
|
||||
</a>
|
||||
</li>
|
||||
|
||||
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|
||||
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||||
<li class="md-nav__item">
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||||
<a href="../../chapter_searching/binary_search/" class="md-nav__link">
|
||||
10.2. 二分查找
|
||||
10.2. 二分查找
|
||||
</a>
|
||||
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|
||||
|
||||
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|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../../chapter_searching/hashing_search/" class="md-nav__link">
|
||||
10.3. 哈希查找
|
||||
10.3. 哈希查找
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1367,7 +1367,7 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../../chapter_searching/summary/" class="md-nav__link">
|
||||
10.4. 小结
|
||||
10.4. 小结
|
||||
</a>
|
||||
</li>
|
||||
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||||
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|
||||
|
||||
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||||
<label class="md-nav__link" for="__nav_12" id="__nav_12_label" tabindex="0">
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11. 排序算法
|
||||
11. 排序算法
|
||||
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|
||||
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|
||||
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||||
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|
||||
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||||
<span class="md-nav__icon md-icon"></span>
|
||||
11. 排序算法
|
||||
11. 排序算法
|
||||
</label>
|
||||
<ul class="md-nav__list" data-md-scrollfix>
|
||||
|
||||
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|
||||
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||||
<li class="md-nav__item">
|
||||
<a href="../../chapter_sorting/intro_to_sort/" class="md-nav__link">
|
||||
11.1. 排序简介
|
||||
11.1. 排序简介
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1446,7 +1446,7 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../../chapter_sorting/bubble_sort/" class="md-nav__link">
|
||||
11.2. 冒泡排序
|
||||
11.2. 冒泡排序
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1460,7 +1460,7 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../../chapter_sorting/insertion_sort/" class="md-nav__link">
|
||||
11.3. 插入排序
|
||||
11.3. 插入排序
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1474,7 +1474,7 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../../chapter_sorting/quick_sort/" class="md-nav__link">
|
||||
11.4. 快速排序
|
||||
11.4. 快速排序
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1488,7 +1488,7 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../../chapter_sorting/merge_sort/" class="md-nav__link">
|
||||
11.5. 归并排序
|
||||
11.5. 归并排序
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1502,7 +1502,7 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="../../chapter_sorting/summary/" class="md-nav__link">
|
||||
11.6. 小结
|
||||
11.6. 小结
|
||||
</a>
|
||||
</li>
|
||||
|
||||
@@ -1590,24 +1590,24 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#711" class="md-nav__link">
|
||||
7.1.1. 二叉树常见术语
|
||||
7.1.1. 二叉树常见术语
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#712" class="md-nav__link">
|
||||
7.1.2. 二叉树基本操作
|
||||
7.1.2. 二叉树基本操作
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#713" class="md-nav__link">
|
||||
7.1.3. 常见二叉树类型
|
||||
7.1.3. 常见二叉树类型
|
||||
</a>
|
||||
|
||||
<nav class="md-nav" aria-label="7.1.3. 常见二叉树类型">
|
||||
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|
||||
<ul class="md-nav__list">
|
||||
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||||
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|
||||
@@ -1645,14 +1645,14 @@
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#714" class="md-nav__link">
|
||||
7.1.4. 二叉树的退化
|
||||
7.1.4. 二叉树的退化
|
||||
</a>
|
||||
|
||||
</li>
|
||||
|
||||
<li class="md-nav__item">
|
||||
<a href="#715" class="md-nav__link">
|
||||
7.1.5. 二叉树表示方式 *
|
||||
7.1.5. 二叉树表示方式 *
|
||||
</a>
|
||||
|
||||
</li>
|
||||
@@ -1681,7 +1681,7 @@
|
||||
|
||||
|
||||
|
||||
<h1 id="71">7.1. 二叉树<a class="headerlink" href="#71" title="Permanent link">¶</a></h1>
|
||||
<h1 id="71">7.1. 二叉树<a class="headerlink" href="#71" title="Permanent link">¶</a></h1>
|
||||
<p>「二叉树 Binary Tree」是一种非线性数据结构,代表着祖先与后代之间的派生关系,体现着“一分为二”的分治逻辑。类似于链表,二叉树也是以结点为单位存储的,结点包含「值」和两个「指针」。</p>
|
||||
<div class="tabbed-set tabbed-alternate" data-tabs="1:10"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><input id="__tabbed_1_2" name="__tabbed_1" type="radio" /><input id="__tabbed_1_3" name="__tabbed_1" type="radio" /><input id="__tabbed_1_4" name="__tabbed_1" type="radio" /><input id="__tabbed_1_5" name="__tabbed_1" type="radio" /><input id="__tabbed_1_6" name="__tabbed_1" type="radio" /><input id="__tabbed_1_7" name="__tabbed_1" type="radio" /><input id="__tabbed_1_8" name="__tabbed_1" type="radio" /><input id="__tabbed_1_9" name="__tabbed_1" type="radio" /><input id="__tabbed_1_10" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">Java</label><label for="__tabbed_1_2">C++</label><label for="__tabbed_1_3">Python</label><label for="__tabbed_1_4">Go</label><label for="__tabbed_1_5">JavaScript</label><label for="__tabbed_1_6">TypeScript</label><label for="__tabbed_1_7">C</label><label for="__tabbed_1_8">C#</label><label for="__tabbed_1_9">Swift</label><label for="__tabbed_1_10">Zig</label></div>
|
||||
<div class="tabbed-content">
|
||||
@@ -1793,7 +1793,7 @@
|
||||
<p><img alt="binary_tree_definition" src="../binary_tree.assets/binary_tree_definition.png" /></p>
|
||||
<p align="center"> Fig. 子结点与子树 </p>
|
||||
|
||||
<h2 id="711">7.1.1. 二叉树常见术语<a class="headerlink" href="#711" title="Permanent link">¶</a></h2>
|
||||
<h2 id="711">7.1.1. 二叉树常见术语<a class="headerlink" href="#711" title="Permanent link">¶</a></h2>
|
||||
<p>二叉树的术语较多,建议尽量理解并记住。后续可能遗忘,可以在需要使用时回来查看确认。</p>
|
||||
<ul>
|
||||
<li>「根结点 Root Node」:二叉树最顶层的结点,其没有父结点;</li>
|
||||
@@ -1812,7 +1812,7 @@
|
||||
<p class="admonition-title">高度与深度的定义</p>
|
||||
<p>值得注意,我们通常将「高度」和「深度」定义为“走过边的数量”,而有些题目或教材会将其定义为“走过结点的数量”,此时高度或深度都需要 + 1 。</p>
|
||||
</div>
|
||||
<h2 id="712">7.1.2. 二叉树基本操作<a class="headerlink" href="#712" title="Permanent link">¶</a></h2>
|
||||
<h2 id="712">7.1.2. 二叉树基本操作<a class="headerlink" href="#712" title="Permanent link">¶</a></h2>
|
||||
<p><strong>初始化二叉树</strong>。与链表类似,先初始化结点,再构建引用指向(即指针)。</p>
|
||||
<div class="tabbed-set tabbed-alternate" data-tabs="2:10"><input checked="checked" id="__tabbed_2_1" name="__tabbed_2" type="radio" /><input id="__tabbed_2_2" name="__tabbed_2" type="radio" /><input id="__tabbed_2_3" name="__tabbed_2" type="radio" /><input id="__tabbed_2_4" name="__tabbed_2" type="radio" /><input id="__tabbed_2_5" name="__tabbed_2" type="radio" /><input id="__tabbed_2_6" name="__tabbed_2" type="radio" /><input id="__tabbed_2_7" name="__tabbed_2" type="radio" /><input id="__tabbed_2_8" name="__tabbed_2" type="radio" /><input id="__tabbed_2_9" name="__tabbed_2" type="radio" /><input id="__tabbed_2_10" name="__tabbed_2" type="radio" /><div class="tabbed-labels"><label for="__tabbed_2_1">Java</label><label for="__tabbed_2_2">C++</label><label for="__tabbed_2_3">Python</label><label for="__tabbed_2_4">Go</label><label for="__tabbed_2_5">JavaScript</label><label for="__tabbed_2_6">TypeScript</label><label for="__tabbed_2_7">C</label><label for="__tabbed_2_8">C#</label><label for="__tabbed_2_9">Swift</label><label for="__tabbed_2_10">Zig</label></div>
|
||||
<div class="tabbed-content">
|
||||
@@ -2042,7 +2042,7 @@
|
||||
<p class="admonition-title">Note</p>
|
||||
<p>插入结点会改变二叉树的原有逻辑结构,删除结点往往意味着删除了该结点的所有子树。因此,二叉树中的插入与删除一般都是由一套操作配合完成的,这样才能实现有意义的操作。</p>
|
||||
</div>
|
||||
<h2 id="713">7.1.3. 常见二叉树类型<a class="headerlink" href="#713" title="Permanent link">¶</a></h2>
|
||||
<h2 id="713">7.1.3. 常见二叉树类型<a class="headerlink" href="#713" title="Permanent link">¶</a></h2>
|
||||
<h3 id="_1">完美二叉树<a class="headerlink" href="#_1" title="Permanent link">¶</a></h3>
|
||||
<p>「完美二叉树 Perfect Binary Tree」的所有层的结点都被完全填满。在完美二叉树中,所有结点的度 = 2 ;若树高度 <span class="arithmatex">\(= h\)</span> ,则结点总数 <span class="arithmatex">\(= 2^{h+1} - 1\)</span> ,呈标准的指数级关系,反映着自然界中常见的细胞分裂。</p>
|
||||
<div class="admonition tip">
|
||||
@@ -2060,7 +2060,7 @@
|
||||
<h3 id="_4">平衡二叉树<a class="headerlink" href="#_4" title="Permanent link">¶</a></h3>
|
||||
<p>「平衡二叉树 Balanced Binary Tree」中任意结点的左子树和右子树的高度之差的绝对值 <span class="arithmatex">\(\leq 1\)</span> 。</p>
|
||||
<p><img alt="balanced_binary_tree" src="../binary_tree.assets/balanced_binary_tree.png" /></p>
|
||||
<h2 id="714">7.1.4. 二叉树的退化<a class="headerlink" href="#714" title="Permanent link">¶</a></h2>
|
||||
<h2 id="714">7.1.4. 二叉树的退化<a class="headerlink" href="#714" title="Permanent link">¶</a></h2>
|
||||
<p>当二叉树的每层的结点都被填满时,达到「完美二叉树」;而当所有结点都偏向一边时,二叉树退化为「链表」。</p>
|
||||
<ul>
|
||||
<li>完美二叉树是一个二叉树的“最佳状态”,可以完全发挥出二叉树“分治”的优势;</li>
|
||||
@@ -2103,7 +2103,7 @@
|
||||
</tbody>
|
||||
</table>
|
||||
</div>
|
||||
<h2 id="715">7.1.5. 二叉树表示方式 *<a class="headerlink" href="#715" title="Permanent link">¶</a></h2>
|
||||
<h2 id="715">7.1.5. 二叉树表示方式 *<a class="headerlink" href="#715" title="Permanent link">¶</a></h2>
|
||||
<p>我们一般使用二叉树的「链表表示」,即存储单位为结点 <code>TreeNode</code> ,结点之间通过指针(引用)相连接。本文前述示例代码展示了二叉树在链表表示下的各项基本操作。</p>
|
||||
<p>那能否可以用「数组表示」二叉树呢?答案是肯定的。先来分析一个简单案例,给定一个「完美二叉树」,将结点按照层序遍历的顺序编号(从 0 开始),那么可以推导得出父结点索引与子结点索引之间的「映射公式」:<strong>设结点的索引为 <span class="arithmatex">\(i\)</span> ,则该结点的左子结点索引为 <span class="arithmatex">\(2i + 1\)</span> 、右子结点索引为 <span class="arithmatex">\(2i + 2\)</span></strong> 。</p>
|
||||
<p><strong>本质上,映射公式的作用就是链表中的指针</strong>。对于层序遍历序列中的任意结点,我们都可以使用映射公式来访问子结点。因此,可以直接使用层序遍历序列(即数组)来表示完美二叉树。</p>
|
||||
@@ -2251,7 +2251,7 @@
|
||||
<nav class="md-footer__inner md-grid" aria-label="页脚" >
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<a href="../../chapter_hashing/summary/" class="md-footer__link md-footer__link--prev" aria-label="上一页: 6.3. 小结" rel="prev">
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<span class="md-footer__direction">
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上一页
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6.3. 小结
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6.3. 小结
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</div>
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</div>
|
||||
</a>
|
||||
|
||||
|
||||
|
||||
<a href="../binary_tree_traversal/" class="md-footer__link md-footer__link--next" aria-label="下一页: 7.2. 二叉树遍历" rel="next">
|
||||
<a href="../binary_tree_traversal/" class="md-footer__link md-footer__link--next" aria-label="下一页: 7.2. &nbsp; 二叉树遍历" rel="next">
|
||||
<div class="md-footer__title">
|
||||
<div class="md-ellipsis">
|
||||
<span class="md-footer__direction">
|
||||
下一页
|
||||
</span>
|
||||
7.2. 二叉树遍历
|
||||
7.2. 二叉树遍历
|
||||
</div>
|
||||
</div>
|
||||
<div class="md-footer__button md-icon">
|
||||
|
||||
Reference in New Issue
Block a user