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</ul>
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<h3 id="2-q-a">2. Q & A<a class="headerlink" href="#2-q-a" title="Permanent link">¶</a></h3>
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<div class="admonition question">
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<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>
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<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>
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<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>
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</div>
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<div class="admonition question">
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