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</ul>
<h3 id="2-q-a">2. &nbsp; Q &amp; A<a class="headerlink" href="#2-q-a" title="Permanent link">&para;</a></h3>
<div class="admonition question">
<p class="admonition-title">哈希表的时间复杂度为什么不是 <span class="arithmatex">\(O(n)\)</span> ？</p>
<p class="admonition-title">哈希表的时间复杂度在什么情况下是 <span class="arithmatex">\(O(n)\)</span> ？</p>
<p>当哈希冲突比较严重时，哈希表的时间复杂度会退化至 <span class="arithmatex">\(O(n)\)</span> 。当哈希函数设计得比较好、容量设置比较合理、冲突比较平均时，时间复杂度是 <span class="arithmatex">\(O(1)\)</span> 。我们使用编程语言内置的哈希表时，通常认为时间复杂度是 <span class="arithmatex">\(O(1)\)</span> 。</p>
</div>
<div class="admonition question">