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krahets
2023-07-11 19:21:38 +08:00
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117 changed files with 4713 additions and 132 deletions

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@@ -1916,6 +1916,8 @@
@@ -1994,6 +1996,20 @@
<li class="md-nav__item">
<a href="../../chapter_dynamic_programming/unbounded_knapsack_problem/" class="md-nav__link">
13.5. &nbsp; 完全背包问题New
</a>
</li>
</ul>
</nav>
</li>
@@ -2260,7 +2276,7 @@
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<div class="tabbed-content">
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="cm">/* 使用多种基本数据类型来初始化数组」 */</span>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="c1">// 使用多种基本数据类型来初始化数组</span>
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="kt">int</span><span class="o">[]</span><span class="w"> </span><span class="n">numbers</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="kt">int</span><span class="o">[</span><span class="mi">5</span><span class="o">]</span><span class="p">;</span>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="kt">float</span><span class="o">[]</span><span class="w"> </span><span class="n">decimals</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="kt">float</span><span class="o">[</span><span class="mi">5</span><span class="o">]</span><span class="p">;</span>
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a><span class="kt">char</span><span class="o">[]</span><span class="w"> </span><span class="n">characters</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="kt">char</span><span class="o">[</span><span class="mi">5</span><span class="o">]</span><span class="p">;</span>
@@ -2268,7 +2284,7 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="cm">/* 使用多种基本数据类型来初始化数组」 */</span>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="c1">// 使用多种基本数据类型来初始化数组</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="kt">int</span><span class="w"> </span><span class="n">numbers</span><span class="p">[</span><span class="mi">5</span><span class="p">];</span>
<a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="kt">float</span><span class="w"> </span><span class="n">decimals</span><span class="p">[</span><span class="mi">5</span><span class="p">];</span>
<a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a><span class="kt">char</span><span class="w"> </span><span class="n">characters</span><span class="p">[</span><span class="mi">5</span><span class="p">];</span>
@@ -2289,19 +2305,19 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a><span class="cm">/* JavaScript 的数组可以自由存储各种基本数据类型和对象 */</span>
<div class="highlight"><pre><span></span><code><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a><span class="c1">// JavaScript 的数组可以自由存储各种基本数据类型和对象</span>
<a id="__codelineno-4-2" name="__codelineno-4-2" href="#__codelineno-4-2"></a><span class="kd">const</span><span class="w"> </span><span class="nx">array</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[</span><span class="mf">0</span><span class="p">,</span><span class="w"> </span><span class="mf">0.0</span><span class="p">,</span><span class="w"> </span><span class="s1">&#39;a&#39;</span><span class="p">,</span><span class="w"> </span><span class="kc">false</span><span class="p">];</span>
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a><span class="cm">/* 使用多种基本数据类型来初始化数组」 */</span>
<div class="highlight"><pre><span></span><code><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a><span class="c1">// 使用多种基本数据类型来初始化数组</span>
<a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a><span class="kd">const</span><span class="w"> </span><span class="nx">numbers</span><span class="o">:</span><span class="w"> </span><span class="kt">number</span><span class="p">[]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[];</span>
<a id="__codelineno-5-3" name="__codelineno-5-3" href="#__codelineno-5-3"></a><span class="kd">const</span><span class="w"> </span><span class="nx">characters</span><span class="o">:</span><span class="w"> </span><span class="kt">string</span><span class="p">[]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[];</span>
<a id="__codelineno-5-4" name="__codelineno-5-4" href="#__codelineno-5-4"></a><span class="kd">const</span><span class="w"> </span><span class="nx">booleans</span><span class="o">:</span><span class="w"> </span><span class="kt">boolean</span><span class="p">[]</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[];</span>
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><a id="__codelineno-6-1" name="__codelineno-6-1" href="#__codelineno-6-1"></a><span class="cm">/* 使用多种基本数据类型来初始化数组」 */</span>
<div class="highlight"><pre><span></span><code><a id="__codelineno-6-1" name="__codelineno-6-1" href="#__codelineno-6-1"></a><span class="c1">// 使用多种基本数据类型来初始化数组</span>
<a id="__codelineno-6-2" name="__codelineno-6-2" href="#__codelineno-6-2"></a><span class="kt">int</span><span class="w"> </span><span class="n">numbers</span><span class="p">[</span><span class="mi">10</span><span class="p">];</span>
<a id="__codelineno-6-3" name="__codelineno-6-3" href="#__codelineno-6-3"></a><span class="kt">float</span><span class="w"> </span><span class="n">decimals</span><span class="p">[</span><span class="mi">10</span><span class="p">];</span>
<a id="__codelineno-6-4" name="__codelineno-6-4" href="#__codelineno-6-4"></a><span class="kt">char</span><span class="w"> </span><span class="n">characters</span><span class="p">[</span><span class="mi">10</span><span class="p">];</span>
@@ -2309,7 +2325,7 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a><span class="cm">/* 使用多种基本数据类型来初始化数组」 */</span>
<div class="highlight"><pre><span></span><code><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a><span class="c1">// 使用多种基本数据类型来初始化数组</span>
<a id="__codelineno-7-2" name="__codelineno-7-2" href="#__codelineno-7-2"></a><span class="kt">int</span><span class="p">[]</span><span class="w"> </span><span class="n">numbers</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="kt">int</span><span class="p">[</span><span class="m">5</span><span class="p">];</span>
<a id="__codelineno-7-3" name="__codelineno-7-3" href="#__codelineno-7-3"></a><span class="kt">float</span><span class="p">[]</span><span class="w"> </span><span class="n">decimals</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="kt">float</span><span class="p">[</span><span class="m">5</span><span class="p">];</span>
<a id="__codelineno-7-4" name="__codelineno-7-4" href="#__codelineno-7-4"></a><span class="kt">char</span><span class="p">[]</span><span class="w"> </span><span class="n">characters</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="kt">char</span><span class="p">[</span><span class="m">5</span><span class="p">];</span>
@@ -2317,7 +2333,7 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="cm">/* 使用多种基本数据类型来初始化数组」 */</span>
<div class="highlight"><pre><span></span><code><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="c1">// 使用多种基本数据类型来初始化数组</span>
<a id="__codelineno-8-2" name="__codelineno-8-2" href="#__codelineno-8-2"></a><span class="kd">let</span> <span class="nv">numbers</span> <span class="p">=</span> <span class="nb">Array</span><span class="p">(</span><span class="n">repeating</span><span class="p">:</span> <span class="nb">Int</span><span class="p">(),</span> <span class="bp">count</span><span class="p">:</span> <span class="mi">5</span><span class="p">)</span>
<a id="__codelineno-8-3" name="__codelineno-8-3" href="#__codelineno-8-3"></a><span class="kd">let</span> <span class="nv">decimals</span> <span class="p">=</span> <span class="nb">Array</span><span class="p">(</span><span class="n">repeating</span><span class="p">:</span> <span class="nb">Double</span><span class="p">(),</span> <span class="bp">count</span><span class="p">:</span> <span class="mi">5</span><span class="p">)</span>
<a id="__codelineno-8-4" name="__codelineno-8-4" href="#__codelineno-8-4"></a><span class="kd">let</span> <span class="nv">characters</span> <span class="p">=</span> <span class="nb">Array</span><span class="p">(</span><span class="n">repeating</span><span class="p">:</span> <span class="nb">Character</span><span class="p">(</span><span class="s">&quot;a&quot;</span><span class="p">),</span> <span class="bp">count</span><span class="p">:</span> <span class="mi">5</span><span class="p">)</span>
@@ -2329,7 +2345,7 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><pre><span></span><code><a id="__codelineno-10-1" name="__codelineno-10-1" href="#__codelineno-10-1"></a><span class="cm">/* 使用多种基本数据类型来初始化数组」 */</span>
<div class="highlight"><pre><span></span><code><a id="__codelineno-10-1" name="__codelineno-10-1" href="#__codelineno-10-1"></a><span class="c1">// 使用多种基本数据类型来初始化数组</span>
<a id="__codelineno-10-2" name="__codelineno-10-2" href="#__codelineno-10-2"></a><span class="n">List</span><span class="o">&lt;</span><span class="kt">int</span><span class="o">&gt;</span><span class="w"> </span><span class="n">numbers</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">List</span><span class="p">.</span><span class="n">filled</span><span class="p">(</span><span class="m">5</span><span class="p">,</span><span class="w"> </span><span class="m">0</span><span class="p">);</span>
<a id="__codelineno-10-3" name="__codelineno-10-3" href="#__codelineno-10-3"></a><span class="n">List</span><span class="o">&lt;</span><span class="kt">double</span><span class="o">&gt;</span><span class="w"> </span><span class="n">decimals</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">List</span><span class="p">.</span><span class="n">filled</span><span class="p">(</span><span class="m">5</span><span class="p">,</span><span class="w"> </span><span class="m">0.0</span><span class="p">);</span>
<a id="__codelineno-10-4" name="__codelineno-10-4" href="#__codelineno-10-4"></a><span class="n">List</span><span class="o">&lt;</span><span class="kt">String</span><span class="o">&gt;</span><span class="w"> </span><span class="n">characters</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">List</span><span class="p">.</span><span class="n">filled</span><span class="p">(</span><span class="m">5</span><span class="p">,</span><span class="w"> </span><span class="s1">&#39;a&#39;</span><span class="p">);</span>

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@@ -1975,6 +1975,8 @@
@@ -2053,6 +2055,20 @@
<li class="md-nav__item">
<a href="../../chapter_dynamic_programming/unbounded_knapsack_problem/" class="md-nav__link">
13.5. &nbsp; 完全背包问题New
</a>
</li>
</ul>
</nav>
</li>

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@@ -1954,6 +1954,8 @@
@@ -2032,6 +2034,20 @@
<li class="md-nav__item">
<a href="../../chapter_dynamic_programming/unbounded_knapsack_problem/" class="md-nav__link">
13.5. &nbsp; 完全背包问题New
</a>
</li>
</ul>
</nav>
</li>
@@ -2219,16 +2235,22 @@
<p>数据结构可以从逻辑结构和物理结构两个维度进行分类。</p>
<h2 id="311">3.1.1. &nbsp; 逻辑结构:线性与非线性<a class="headerlink" href="#311" title="Permanent link">&para;</a></h2>
<p><strong>「逻辑结构」揭示了数据元素之间的逻辑关系</strong>。在数组和链表中,数据按照顺序依次排列,体现了数据之间的线性关系;而在树中,数据从顶部向下按层次排列,表现出祖先与后代之间的派生关系;图则由节点和边构成,反映了复杂的网络关系。</p>
<p>逻辑结构通常分为线性」和「非线性两类。线性结构比较直观,指数据在逻辑关系上呈线性排列;非线性结构则相反,呈非线性排列,例如网状或树状结构</p>
<p>逻辑结构通常分为线性”和“非线性两类。线性结构比较直观,指数据在逻辑关系上呈线性排列;非线性结构则相反,呈非线性排列。</p>
<ul>
<li><strong>线性数据结构</strong>:数组、链表、栈、队列、哈希表;</li>
<li><strong>非线性数据结构</strong>:树、图、堆、哈希表;</li>
<li><strong>非线性数据结构</strong>:树、堆、图、哈希表;</li>
</ul>
<p><img alt="线性与非线性数据结构" src="../classification_of_data_structure.assets/classification_logic_structure.png" /></p>
<p align="center"> Fig. 线性与非线性数据结构 </p>
<p>非线性数据结构可以进一步被划分为树形结构和网状结构。</p>
<ul>
<li><strong>线性结构</strong>:数组、链表、队列、栈、哈希表,元素存在一对一的顺序关系;</li>
<li><strong>树形结构</strong>:树、堆、哈希表,元素存在一对多的关系;</li>
<li><strong>网状结构</strong>:图,元素存在多对多的关系;</li>
</ul>
<h2 id="312">3.1.2. &nbsp; 物理结构:连续与离散<a class="headerlink" href="#312" title="Permanent link">&para;</a></h2>
<p>在计算机中,内存和硬盘是两种主要的存储硬件设备。硬盘主要用于长期存储数据,容量较大(通常可达到 TB 级别)、速度较慢。内存用于运行程序时暂存数据,速度较快,但容量较小(通常为 GB 级别)。</p>
<p>在计算机中,内存和硬盘是两种主要的存储硬件设备。硬盘主要用于长期存储数据,容量较大(通常可达到 TB 级别)、速度较慢。内存用于运行程序时暂存数据,速度较快,但容量较小(通常为 GB 级别)。</p>
<p><strong>在算法运行过程中,相关数据都存储在内存中</strong>。下图展示了一个计算机内存条,其中每个黑色方块都包含一块内存空间。我们可以将内存想象成一个巨大的 Excel 表格,其中每个单元格都可以存储 1 byte 的数据,在算法运行时,所有数据都被存储在这些单元格中。</p>
<p><strong>系统通过「内存地址 Memory Location」来访问目标内存位置的数据</strong>。计算机根据特定规则为表格中的每个单元格分配编号,确保每个内存空间都有唯一的内存地址。有了这些地址,程序便可以访问内存中的数据。</p>
<p><img alt="内存条、内存空间、内存地址" src="../classification_of_data_structure.assets/computer_memory_location.png" /></p>
@@ -2244,7 +2266,7 @@
<li><strong>基于数组可实现</strong>:栈、队列、哈希表、树、堆、图、矩阵、张量(维度 <span class="arithmatex">\(\geq 3\)</span> 的数组)等;</li>
<li><strong>基于链表可实现</strong>:栈、队列、哈希表、树、堆、图等;</li>
</ul>
<p>基于数组实现的数据结构也被称为静态数据结构,这意味着此类数据结构在初始化后长度不可变。相对应地,基于链表实现的数据结构被称为动态数据结构,这类数据结构在初始化后,仍可以在程序运行过程中对其长度进行调整。</p>
<p>基于数组实现的数据结构也被称为静态数据结构,这意味着此类数据结构在初始化后长度不可变。相对应地,基于链表实现的数据结构被称为动态数据结构,这类数据结构在初始化后,仍可以在程序运行过程中对其长度进行调整。</p>
<div class="admonition tip">
<p class="admonition-title">Tip</p>
<p>如若感觉理解物理结构有困难,建议先阅读下一章“数组与链表”,然后再回头理解物理结构的含义。数组与链表是其他所有数据结构的基石,建议你投入更多时间深入了解这两种基本数据结构。</p>

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@@ -1906,6 +1906,8 @@
@@ -1984,6 +1986,20 @@
<li class="md-nav__item">
<a href="../chapter_dynamic_programming/unbounded_knapsack_problem/" class="md-nav__link">
13.5. &nbsp; 完全背包问题New
</a>
</li>
</ul>
</nav>
</li>

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@@ -1954,6 +1954,8 @@
@@ -2032,6 +2034,20 @@
<li class="md-nav__item">
<a href="../../chapter_dynamic_programming/unbounded_knapsack_problem/" class="md-nav__link">
13.5. &nbsp; 完全背包问题New
</a>
</li>
</ul>
</nav>
</li>

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@@ -1947,6 +1947,8 @@
@@ -2025,6 +2027,20 @@
<li class="md-nav__item">
<a href="../../chapter_dynamic_programming/unbounded_knapsack_problem/" class="md-nav__link">
13.5. &nbsp; 完全背包问题New
</a>
</li>
</ul>
</nav>
</li>