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add leetcode problem-cn part3

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<p>给你一个字符串 <code>s</code> ,根据下述规则反转字符串:</p>
<ul>
<li>所有非英文字母保留在原有位置。</li>
<li>所有英文字母(小写或大写)位置反转。</li>
</ul>
<p>返回反转后的 <code>s</code><em></em></p>
<p>&nbsp;</p>
<ol>
</ol>
<p><strong>示例 1</strong></p>
<pre>
<strong>输入:</strong>s = "ab-cd"
<strong>输出:</strong>"dc-ba"
</pre>
<ol>
</ol>
<p><strong>示例 2</strong></p>
<pre>
<strong>输入:</strong>s = "a-bC-dEf-ghIj"
<strong>输出:</strong>"j-Ih-gfE-dCba"
</pre>
<ol>
</ol>
<p><strong>示例 3</strong></p>
<pre>
<strong>输入:</strong>s = "Test1ng-Leet=code-Q!"
<strong>输出:</strong>"Qedo1ct-eeLg=ntse-T!"
</pre>
<p>&nbsp;</p>
<p><strong>提示</strong></p>
<ul>
<li><code>1 &lt;= s.length &lt;= 100</code></li>
<li><code>s</code> 仅由 ASCII 值在范围 <code>[33, 122]</code> 的字符组成</li>
<li><code>s</code> 不含 <code>'\"'</code><code>'\\'</code></li>
</ul>