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<h1 id="132">13.2 &nbsp; 全排列问题<a class="headerlink" href="#132" title="Permanent link">&para;</a></h1>
<p>全排列问题是回溯算法的一个典型应用。它的定义是在给定一个集合（如一个数组或字符串）的情况下，找出这个集合中元素的所有可能的排列。</p>
<p>表 13-2 列举了几个示例数据，包括输入数组和对应的所有排列。</p>
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<p><img alt="两种剪枝条件的作用范围" src="../permutations_problem.assets/permutations_ii_pruning_summary.png" /></p>
<p align="center"> 图 13-9 &nbsp; 两种剪枝条件的作用范围 </p>
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