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@ -1743,7 +1745,6 @@
<h1 id="21">2.1. &nbsp; 算法效率评估<a class="headerlink" href="#21" title="Permanent link">&para;</a></h1>
<h2 id="211">2.1.1. &nbsp; 算法评价维度<a class="headerlink" href="#211" title="Permanent link">&para;</a></h2>
<p>在开始学习算法之前,我们首先要想清楚算法的设计目标是什么,或者说,如何来评判算法的好与坏。整体上看,我们设计算法时追求两个层面的目标。</p>
@ -1906,7 +1907,7 @@
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@ -1785,7 +1787,6 @@
<h1 id="23">2.3. &nbsp; 空间复杂度<a class="headerlink" href="#23" title="Permanent link">&para;</a></h1>
<p>「空间复杂度 Space Complexity」统计 <strong>算法使用内存空间随着数据量变大时的增长趋势</strong>。这个概念与时间复杂度很类似。</p>
<h2 id="231">2.3.1. &nbsp; 算法相关空间<a class="headerlink" href="#231" title="Permanent link">&para;</a></h2>
@ -3258,7 +3259,7 @@ O(1) &lt; O(\log n) &lt; O(n) &lt; O(n^2) &lt; O(2^n) \newline
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@ -3269,7 +3270,7 @@ O(1) &lt; O(\log n) &lt; O(n) &lt; O(n^2) &lt; O(2^n) \newline
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@ -3280,7 +3281,7 @@ O(1) &lt; O(\log n) &lt; O(n) &lt; O(n^2) &lt; O(2^n) \newline
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@ -3294,10 +3295,10 @@ O(1) &lt; O(\log n) &lt; O(n) &lt; O(n^2) &lt; O(2^n) \newline
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krahets/hello-algo
@ -228,7 +230,7 @@
<a href="https://github.com/krahets/hello-algo" title="前往仓库" class="md-source" data-md-component="source">
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 496 512"><!--! Font Awesome Free 6.3.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc.--><path d="M165.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6zm-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3zm44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9zM244.8 8C106.1 8 0 113.3 0 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C428.2 457.8 496 362.9 496 252 496 113.3 383.5 8 244.8 8zM97.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1zm-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7zm32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1zm-11.4-14.7c-1.6 1-1.6 3.6 0 5.9 1.6 2.3 4.3 3.3 5.6 2.3 1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2z"/></svg>
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krahets/hello-algo
@ -1715,7 +1717,6 @@
<h1 id="24">2.4. &nbsp; 权衡时间与空间<a class="headerlink" href="#24" title="Permanent link">&para;</a></h1>
<p>理想情况下,我们希望算法的时间复杂度和空间复杂度都能够达到最优,而实际上,同时优化时间复杂度和空间复杂度是非常困难的。</p>
<p><strong>降低时间复杂度,往往是以提升空间复杂度为代价的,反之亦然</strong>。我们把牺牲内存空间来提升算法运行速度的思路称为「以空间换时间」;反之,称之为「以时间换空间」。选择哪种思路取决于我们更看重哪个方面。</p>
@ -2179,7 +2180,7 @@
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krahets/hello-algo
@ -1895,7 +1897,6 @@
<h1 id="22">2.2. &nbsp; 时间复杂度<a class="headerlink" href="#22" title="Permanent link">&para;</a></h1>
<h2 id="221">2.2.1. &nbsp; 统计算法运行时间<a class="headerlink" href="#221" title="Permanent link">&para;</a></h2>
<p>运行时间能够直观且准确地体现出算法的效率水平。如果我们想要 <strong>准确预估一段代码的运行时间</strong> ,该如何做呢?</p>
@ -4427,7 +4428,7 @@ n! = n \times (n - 1) \times (n - 2) \times \cdots \times 2 \times 1
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@ -4438,7 +4439,7 @@ n! = n \times (n - 1) \times (n - 2) \times \cdots \times 2 \times 1
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@ -4449,7 +4450,7 @@ n! = n \times (n - 1) \times (n - 2) \times \cdots \times 2 \times 1
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@ -4463,10 +4464,10 @@ n! = n \times (n - 1) \times (n - 2) \times \cdots \times 2 \times 1
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