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<title>5.3. 双向队列Deque - Hello 算法</title>
<title>5.3.   双向队列Deque - Hello 算法</title>
@@ -111,7 +111,7 @@
<div class="md-header__topic" data-md-component="header-topic">
<span class="md-ellipsis">
5.3. 双向队列Deque
5.3. &nbsp; 双向队列Deque
</span>
</div>
@@ -268,14 +268,14 @@
<label class="md-nav__link" for="__nav_1" id="__nav_1_label" tabindex="0">
0. 写在前面
0. &nbsp; &nbsp; 写在前面
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_1_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_1">
<span class="md-nav__icon md-icon"></span>
0. 写在前面
0. &nbsp; &nbsp; 写在前面
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -286,7 +286,7 @@
<li class="md-nav__item">
<a href="../../chapter_preface/about_the_book/" class="md-nav__link">
0.1. 关于本书
0.1. &nbsp; 关于本书
</a>
</li>
@@ -300,7 +300,7 @@
<li class="md-nav__item">
<a href="../../chapter_preface/suggestions/" class="md-nav__link">
0.2. 如何使用本书
0.2. &nbsp; 如何使用本书
</a>
</li>
@@ -314,7 +314,7 @@
<li class="md-nav__item">
<a href="../../chapter_preface/installation/" class="md-nav__link">
0.3. 编程环境安装
0.3. &nbsp; 编程环境安装
</a>
</li>
@@ -328,7 +328,7 @@
<li class="md-nav__item">
<a href="../../chapter_preface/contribution/" class="md-nav__link">
0.4. 一起参与创作
0.4. &nbsp; 一起参与创作
</a>
</li>
@@ -367,14 +367,14 @@
<label class="md-nav__link" for="__nav_2" id="__nav_2_label" tabindex="0">
1. 引言
1. &nbsp; &nbsp; 引言
<span class="md-nav__icon md-icon"></span>
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_2_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_2">
<span class="md-nav__icon md-icon"></span>
1. 引言
1. &nbsp; &nbsp; 引言
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -385,7 +385,7 @@
<li class="md-nav__item">
<a href="../../chapter_introduction/algorithms_are_everywhere/" class="md-nav__link">
1.1. 算法无处不在
1.1. &nbsp; 算法无处不在
</a>
</li>
@@ -399,7 +399,7 @@
<li class="md-nav__item">
<a href="../../chapter_introduction/what_is_dsa/" class="md-nav__link">
1.2. 算法是什么
1.2. &nbsp; 算法是什么
</a>
</li>
@@ -444,14 +444,14 @@
<label class="md-nav__link" for="__nav_3" id="__nav_3_label" tabindex="0">
2. 计算复杂度
2. &nbsp; &nbsp; 计算复杂度
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<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_3_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_3">
<span class="md-nav__icon md-icon"></span>
2. 计算复杂度
2. &nbsp; &nbsp; 计算复杂度
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -462,7 +462,7 @@
<li class="md-nav__item">
<a href="../../chapter_computational_complexity/performance_evaluation/" class="md-nav__link">
2.1. 算法效率评估
2.1. &nbsp; 算法效率评估
</a>
</li>
@@ -476,7 +476,7 @@
<li class="md-nav__item">
<a href="../../chapter_computational_complexity/time_complexity/" class="md-nav__link">
2.2. 时间复杂度
2.2. &nbsp; 时间复杂度
</a>
</li>
@@ -490,7 +490,7 @@
<li class="md-nav__item">
<a href="../../chapter_computational_complexity/space_complexity/" class="md-nav__link">
2.3. 空间复杂度
2.3. &nbsp; 空间复杂度
</a>
</li>
@@ -504,7 +504,7 @@
<li class="md-nav__item">
<a href="../../chapter_computational_complexity/space_time_tradeoff/" class="md-nav__link">
2.4. 权衡时间与空间
2.4. &nbsp; 权衡时间与空间
</a>
</li>
@@ -518,7 +518,7 @@
<li class="md-nav__item">
<a href="../../chapter_computational_complexity/summary/" class="md-nav__link">
2.5. 小结
2.5. &nbsp; 小结
</a>
</li>
@@ -559,14 +559,14 @@
<label class="md-nav__link" for="__nav_4" id="__nav_4_label" tabindex="0">
3. 数据结构简介
3. &nbsp; &nbsp; 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
3. &nbsp; &nbsp; 数据结构简介
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -577,7 +577,7 @@
<li class="md-nav__item">
<a href="../../chapter_data_structure/data_and_memory/" class="md-nav__link">
3.1. 数据与内存
3.1. &nbsp; 数据与内存
</a>
</li>
@@ -591,7 +591,7 @@
<li class="md-nav__item">
<a href="../../chapter_data_structure/classification_of_data_structure/" class="md-nav__link">
3.2. 数据结构分类
3.2. &nbsp; 数据结构分类
</a>
</li>
@@ -605,7 +605,7 @@
<li class="md-nav__item">
<a href="../../chapter_data_structure/summary/" class="md-nav__link">
3.3. 小结
3.3. &nbsp; 小结
</a>
</li>
@@ -648,14 +648,14 @@
<label class="md-nav__link" for="__nav_5" id="__nav_5_label" tabindex="0">
4. 数组与链表
4. &nbsp; &nbsp; 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>
4. 数组与链表
4. &nbsp; &nbsp; 数组与链表
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -666,7 +666,7 @@
<li class="md-nav__item">
<a href="../../chapter_array_and_linkedlist/array/" class="md-nav__link">
4.1. 数组Array
4.1. &nbsp; 数组Array
</a>
</li>
@@ -680,7 +680,7 @@
<li class="md-nav__item">
<a href="../../chapter_array_and_linkedlist/linked_list/" class="md-nav__link">
4.2. 链表LinkedList
4.2. &nbsp; 链表LinkedList
</a>
</li>
@@ -694,7 +694,7 @@
<li class="md-nav__item">
<a href="../../chapter_array_and_linkedlist/list/" class="md-nav__link">
4.3. 列表List
4.3. &nbsp; 列表List
</a>
</li>
@@ -708,7 +708,7 @@
<li class="md-nav__item">
<a href="../../chapter_array_and_linkedlist/summary/" class="md-nav__link">
4.4. 小结
4.4. &nbsp; 小结
</a>
</li>
@@ -753,14 +753,14 @@
<label class="md-nav__link" for="__nav_6" id="__nav_6_label" tabindex="0">
5. 栈与队列
5. &nbsp; &nbsp; 栈与队列
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_6_label" aria-expanded="true">
<label class="md-nav__title" for="__nav_6">
<span class="md-nav__icon md-icon"></span>
5. 栈与队列
5. &nbsp; &nbsp; 栈与队列
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -771,7 +771,7 @@
<li class="md-nav__item">
<a href="../stack/" class="md-nav__link">
5.1. 栈Stack
5.1. &nbsp;Stack
</a>
</li>
@@ -785,7 +785,7 @@
<li class="md-nav__item">
<a href="../queue/" class="md-nav__link">
5.2. 队列Queue
5.2. &nbsp; 队列Queue
</a>
</li>
@@ -808,12 +808,12 @@
<label class="md-nav__link md-nav__link--active" for="__toc">
5.3. 双向队列Deque
5.3. &nbsp; 双向队列Deque
<span class="md-nav__icon md-icon"></span>
</label>
<a href="./" class="md-nav__link md-nav__link--active">
5.3. 双向队列Deque
5.3. &nbsp; 双向队列Deque
</a>
@@ -833,17 +833,17 @@
<li class="md-nav__item">
<a href="#531" class="md-nav__link">
5.3.1. 双向队列常用操作
5.3.1. &nbsp; 双向队列常用操作
</a>
</li>
<li class="md-nav__item">
<a href="#532" class="md-nav__link">
5.3.2. 双向队列实现 *
5.3.2. &nbsp; 双向队列实现 *
</a>
<nav class="md-nav" aria-label="5.3.2. 双向队列实现 *">
<nav class="md-nav" aria-label="5.3.2. &nbsp; 双向队列实现 *">
<ul class="md-nav__list">
<li class="md-nav__item">
@@ -881,7 +881,7 @@
<li class="md-nav__item">
<a href="../summary/" class="md-nav__link">
5.4. 小结
5.4. &nbsp; 小结
</a>
</li>
@@ -922,14 +922,14 @@
<label class="md-nav__link" for="__nav_7" id="__nav_7_label" tabindex="0">
6. 散列表
6. &nbsp; &nbsp; 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
6. &nbsp; &nbsp; 散列表
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -940,7 +940,7 @@
<li class="md-nav__item">
<a href="../../chapter_hashing/hash_map/" class="md-nav__link">
6.1. 哈希表HashMap
6.1. &nbsp; 哈希表HashMap
</a>
</li>
@@ -954,7 +954,7 @@
<li class="md-nav__item">
<a href="../../chapter_hashing/hash_collision/" class="md-nav__link">
6.2. 哈希冲突处理
6.2. &nbsp; 哈希冲突处理
</a>
</li>
@@ -968,7 +968,7 @@
<li class="md-nav__item">
<a href="../../chapter_hashing/summary/" class="md-nav__link">
6.3. 小结
6.3. &nbsp; 小结
</a>
</li>
@@ -1013,14 +1013,14 @@
<label class="md-nav__link" for="__nav_8" id="__nav_8_label" tabindex="0">
7. 二叉树
7. &nbsp; &nbsp; 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="false">
<label class="md-nav__title" for="__nav_8">
<span class="md-nav__icon md-icon"></span>
7. 二叉树
7. &nbsp; &nbsp; 二叉树
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -1031,7 +1031,7 @@
<li class="md-nav__item">
<a href="../../chapter_tree/binary_tree/" class="md-nav__link">
7.1. 二叉树Binary Tree
7.1. &nbsp; 二叉树Binary Tree
</a>
</li>
@@ -1045,7 +1045,7 @@
<li class="md-nav__item">
<a href="../../chapter_tree/binary_tree_traversal/" class="md-nav__link">
7.2. 二叉树遍历
7.2. &nbsp; 二叉树遍历
</a>
</li>
@@ -1059,7 +1059,7 @@
<li class="md-nav__item">
<a href="../../chapter_tree/binary_search_tree/" class="md-nav__link">
7.3. 二叉搜索树
7.3. &nbsp; 二叉搜索树
</a>
</li>
@@ -1073,7 +1073,7 @@
<li class="md-nav__item">
<a href="../../chapter_tree/avl_tree/" class="md-nav__link">
7.4. AVL 树 *
7.4. &nbsp; AVL 树 *
</a>
</li>
@@ -1087,7 +1087,7 @@
<li class="md-nav__item">
<a href="../../chapter_tree/summary/" class="md-nav__link">
7.5. 小结
7.5. &nbsp; 小结
</a>
</li>
@@ -1124,14 +1124,14 @@
<label class="md-nav__link" for="__nav_9" id="__nav_9_label" tabindex="0">
8. 堆
8. &nbsp; &nbsp;
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_9_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_9">
<span class="md-nav__icon md-icon"></span>
8. 堆
8. &nbsp; &nbsp;
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -1142,7 +1142,7 @@
<li class="md-nav__item">
<a href="../../chapter_heap/heap/" class="md-nav__link">
8.1. 堆Heap
8.1. &nbsp;Heap
</a>
</li>
@@ -1183,14 +1183,14 @@
<label class="md-nav__link" for="__nav_10" id="__nav_10_label" tabindex="0">
9. 图
9. &nbsp; &nbsp;
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_10_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_10">
<span class="md-nav__icon md-icon"></span>
9. 图
9. &nbsp; &nbsp;
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -1201,7 +1201,7 @@
<li class="md-nav__item">
<a href="../../chapter_graph/graph/" class="md-nav__link">
9.1. 图Graph
9.1. &nbsp;Graph
</a>
</li>
@@ -1215,7 +1215,7 @@
<li class="md-nav__item">
<a href="../../chapter_graph/graph_operations/" class="md-nav__link">
9.2. 图基础操作
9.2. &nbsp; 图基础操作
</a>
</li>
@@ -1229,7 +1229,7 @@
<li class="md-nav__item">
<a href="../../chapter_graph/graph_traversal/" class="md-nav__link">
9.3. 图的遍历
9.3. &nbsp; 图的遍历
</a>
</li>
@@ -1272,14 +1272,14 @@
<label class="md-nav__link" for="__nav_11" id="__nav_11_label" tabindex="0">
10. 查找算法
10. &nbsp; &nbsp; 查找算法
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_11_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_11">
<span class="md-nav__icon md-icon"></span>
10. 查找算法
10. &nbsp; &nbsp; 查找算法
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -1290,7 +1290,7 @@
<li class="md-nav__item">
<a href="../../chapter_searching/linear_search/" class="md-nav__link">
10.1. 线性查找
10.1. &nbsp; 线性查找
</a>
</li>
@@ -1304,7 +1304,7 @@
<li class="md-nav__item">
<a href="../../chapter_searching/binary_search/" class="md-nav__link">
10.2. 二分查找
10.2. &nbsp; 二分查找
</a>
</li>
@@ -1318,7 +1318,7 @@
<li class="md-nav__item">
<a href="../../chapter_searching/hashing_search/" class="md-nav__link">
10.3. 哈希查找
10.3. &nbsp; 哈希查找
</a>
</li>
@@ -1332,7 +1332,7 @@
<li class="md-nav__item">
<a href="../../chapter_searching/summary/" class="md-nav__link">
10.4. 小结
10.4. &nbsp; 小结
</a>
</li>
@@ -1379,14 +1379,14 @@
<label class="md-nav__link" for="__nav_12" id="__nav_12_label" tabindex="0">
11. 排序算法
11. &nbsp; &nbsp; 排序算法
<span class="md-nav__icon md-icon"></span>
</label>
<nav class="md-nav" data-md-level="1" aria-labelledby="__nav_12_label" aria-expanded="false">
<label class="md-nav__title" for="__nav_12">
<span class="md-nav__icon md-icon"></span>
11. 排序算法
11. &nbsp; &nbsp; 排序算法
</label>
<ul class="md-nav__list" data-md-scrollfix>
@@ -1397,7 +1397,7 @@
<li class="md-nav__item">
<a href="../../chapter_sorting/intro_to_sort/" class="md-nav__link">
11.1. 排序简介
11.1. &nbsp; 排序简介
</a>
</li>
@@ -1411,7 +1411,7 @@
<li class="md-nav__item">
<a href="../../chapter_sorting/bubble_sort/" class="md-nav__link">
11.2. 冒泡排序
11.2. &nbsp; 冒泡排序
</a>
</li>
@@ -1425,7 +1425,7 @@
<li class="md-nav__item">
<a href="../../chapter_sorting/insertion_sort/" class="md-nav__link">
11.3. 插入排序
11.3. &nbsp; 插入排序
</a>
</li>
@@ -1439,7 +1439,7 @@
<li class="md-nav__item">
<a href="../../chapter_sorting/quick_sort/" class="md-nav__link">
11.4. 快速排序
11.4. &nbsp; 快速排序
</a>
</li>
@@ -1453,7 +1453,7 @@
<li class="md-nav__item">
<a href="../../chapter_sorting/merge_sort/" class="md-nav__link">
11.5. 归并排序
11.5. &nbsp; 归并排序
</a>
</li>
@@ -1467,7 +1467,7 @@
<li class="md-nav__item">
<a href="../../chapter_sorting/summary/" class="md-nav__link">
11.6. 小结
11.6. &nbsp; 小结
</a>
</li>
@@ -1555,17 +1555,17 @@
<li class="md-nav__item">
<a href="#531" class="md-nav__link">
5.3.1. 双向队列常用操作
5.3.1. &nbsp; 双向队列常用操作
</a>
</li>
<li class="md-nav__item">
<a href="#532" class="md-nav__link">
5.3.2. 双向队列实现 *
5.3.2. &nbsp; 双向队列实现 *
</a>
<nav class="md-nav" aria-label="5.3.2. 双向队列实现 *">
<nav class="md-nav" aria-label="5.3.2. &nbsp; 双向队列实现 *">
<ul class="md-nav__list">
<li class="md-nav__item">
@@ -1611,12 +1611,12 @@
<h1 id="53">5.3. 双向队列<a class="headerlink" href="#53" title="Permanent link">&para;</a></h1>
<h1 id="53">5.3. &nbsp; 双向队列<a class="headerlink" href="#53" title="Permanent link">&para;</a></h1>
<p>对于队列,我们只能在头部删除或在尾部添加元素,而「双向队列 Deque」更加灵活在其头部和尾部都能执行元素添加或删除操作。</p>
<p><img alt="deque_operations" src="../deque.assets/deque_operations.png" /></p>
<p align="center"> Fig. 双向队列的操作 </p>
<h2 id="531">5.3.1. 双向队列常用操作<a class="headerlink" href="#531" title="Permanent link">&para;</a></h2>
<h2 id="531">5.3.1. &nbsp; 双向队列常用操作<a class="headerlink" href="#531" title="Permanent link">&para;</a></h2>
<p>双向队列的常用操作见下表,方法名需根据特定语言来确定。</p>
<p align="center"> Table. 双向队列的常用操作 </p>
@@ -1918,7 +1918,7 @@
</div>
</div>
</div>
<h2 id="532">5.3.2. 双向队列实现 *<a class="headerlink" href="#532" title="Permanent link">&para;</a></h2>
<h2 id="532">5.3.2. &nbsp; 双向队列实现 *<a class="headerlink" href="#532" title="Permanent link">&para;</a></h2>
<p>与队列类似,双向队列同样可以使用链表或数组来实现。</p>
<h3 id="_1">基于双向链表的实现<a class="headerlink" href="#_1" title="Permanent link">&para;</a></h3>
<p>回忆上节内容,由于可以方便地删除链表头结点(对应出队操作),以及在链表尾结点后添加新结点(对应入队操作),因此我们使用普通单向链表来实现队列。</p>
@@ -2835,7 +2835,7 @@
<nav class="md-footer__inner md-grid" aria-label="页脚" >
<a href="../queue/" class="md-footer__link md-footer__link--prev" aria-label="上一页: 5.2. 队列Queue" rel="prev">
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上一页
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5.2. 队列Queue
5.2. &nbsp; 队列Queue
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5.4. 小结
5.4. &nbsp; 小结
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