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            "questionId": "1000254",
            "questionFrontendId": "LCR 018",
            "categoryTitle": "Algorithms",
            "boundTopicId": 910257,
            "title": "验证回文串",
            "titleSlug": "XltzEq",
            "content": "<p>English description is not available for the problem. Please switch to Chinese.</p>\n",
            "translatedTitle": "验证回文串",
            "translatedContent": "<p>给定一个字符串 <code>s</code> ，验证 <code>s</code>&nbsp;是否是&nbsp;<strong>回文串&nbsp;</strong>，只考虑字母和数字字符，可以忽略字母的大小写。</p>\n\n<p>本题中，将空字符串定义为有效的&nbsp;<strong>回文串&nbsp;</strong>。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1:</strong></p>\n\n<pre>\n<strong>输入: </strong>s =<strong> </strong>&quot;A man, a plan, a canal: Panama&quot;\n<strong>输出:</strong> true\n<strong>解释：</strong>&quot;amanaplanacanalpanama&quot; 是回文串</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<strong>输入:</strong> s = &quot;race a car&quot;\n<strong>输出:</strong> false\n解释：&quot;raceacar&quot; 不是回文串</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 2 * 10<sup>5</sup></code></li>\n\t<li>字符串 <code>s</code> 由 ASCII 字符组成</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><meta charset=\"UTF-8\" />注意：本题与主站 125&nbsp;题相同：&nbsp;<a href=\"https://leetcode-cn.com/problems/valid-palindrome/\">https://leetcode-cn.com/problems/valid-palindrome/</a></p>\n",
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