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leetcode-cn/problem (English)/最小回文排列 I(English) [smallest-palindromic-rearrangement-i].html Normal file
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<p>You are given a <strong><span data-keyword="palindrome-string">palindromic</span></strong> string <code>s</code>.</p>
<p>Return the <strong><span data-keyword="lexicographically-smaller-string">lexicographically smallest</span></strong> palindromic <span data-keyword="permutation-string">permutation</span> of <code>s</code>.</p>
<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">s = &quot;z&quot;</span></p>
<p><strong>Output:</strong> <span class="example-io">&quot;z&quot;</span></p>
<p><strong>Explanation:</strong></p>
<p>A string of only one character is already the lexicographically smallest palindrome.</p>
</div>
<p><strong class="example">Example 2:</strong></p>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">s = &quot;babab&quot;</span></p>
<p><strong>Output:</strong> <span class="example-io">&quot;abbba&quot;</span></p>
<p><strong>Explanation:</strong></p>
<p>Rearranging <code>&quot;babab&quot;</code> &rarr; <code>&quot;abbba&quot;</code> gives the smallest lexicographic palindrome.</p>
</div>
<p><strong class="example">Example 3:</strong></p>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">s = &quot;daccad&quot;</span></p>
<p><strong>Output:</strong> <span class="example-io">&quot;acddca&quot;</span></p>
<p><strong>Explanation:</strong></p>
<p>Rearranging <code>&quot;daccad&quot;</code> &rarr; <code>&quot;acddca&quot;</code> gives the smallest lexicographic palindrome.</p>
</div>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>
<ul>
<li><code>1 &lt;= s.length &lt;= 10<sup>5</sup></code></li>
<li><code>s</code> consists of lowercase English letters.</li>
<li><code>s</code> is guaranteed to be palindromic.</li>
</ul>