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            "questionId": "1567",
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            "categoryTitle": "Algorithms",
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            "title": "Maximum Number of Vowels in a Substring of Given Length",
            "titleSlug": "maximum-number-of-vowels-in-a-substring-of-given-length",
            "content": "<p>Given a string <code>s</code> and an integer <code>k</code>, return <em>the maximum number of vowel letters in any substring of </em><code>s</code><em> with length </em><code>k</code>.</p>\n\n<p><strong>Vowel letters</strong> in English are <code>&#39;a&#39;</code>, <code>&#39;e&#39;</code>, <code>&#39;i&#39;</code>, <code>&#39;o&#39;</code>, and <code>&#39;u&#39;</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;abciiidef&quot;, k = 3\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> The substring &quot;iii&quot; contains 3 vowel letters.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;aeiou&quot;, k = 2\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> Any substring of length 2 contains 2 vowels.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;leetcode&quot;, k = 3\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> &quot;lee&quot;, &quot;eet&quot; and &quot;ode&quot; contain 2 vowels.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= s.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>s</code> consists of lowercase English letters.</li>\n\t<li><code>1 &lt;= k &lt;= s.length</code></li>\n</ul>\n",
            "translatedTitle": "定长子串中元音的最大数目",
            "translatedContent": "<p>给你字符串 <code>s</code> 和整数 <code>k</code> 。</p>\n\n<p>请返回字符串 <code>s</code> 中长度为 <code>k</code> 的单个子字符串中可能包含的最大元音字母数。</p>\n\n<p>英文中的 <strong>元音字母 </strong>为（<code>a</code>, <code>e</code>, <code>i</code>, <code>o</code>, <code>u</code>）。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre><strong>输入：</strong>s = &quot;abciiidef&quot;, k = 3\n<strong>输出：</strong>3\n<strong>解释：</strong>子字符串 &quot;iii&quot; 包含 3 个元音字母。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><strong>输入：</strong>s = &quot;aeiou&quot;, k = 2\n<strong>输出：</strong>2\n<strong>解释：</strong>任意长度为 2 的子字符串都包含 2 个元音字母。\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre><strong>输入：</strong>s = &quot;leetcode&quot;, k = 3\n<strong>输出：</strong>2\n<strong>解释：</strong>&quot;lee&quot;、&quot;eet&quot; 和 &quot;ode&quot; 都包含 2 个元音字母。\n</pre>\n\n<p><strong>示例 4：</strong></p>\n\n<pre><strong>输入：</strong>s = &quot;rhythms&quot;, k = 4\n<strong>输出：</strong>0\n<strong>解释：</strong>字符串 s 中不含任何元音字母。\n</pre>\n\n<p><strong>示例 5：</strong></p>\n\n<pre><strong>输入：</strong>s = &quot;tryhard&quot;, k = 4\n<strong>输出：</strong>1\n</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;= 10^5</code></li>\n\t<li><code>s</code> 由小写英文字母组成</li>\n\t<li><code>1 &lt;= k &lt;= s.length</code></li>\n</ul>\n",
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            "hints": [
                "Keep a window of size k and maintain the number of vowels in it.",
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