leetcode-problemset/leetcode-cn/originData/sort-characters-by-frequency.json

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        "question": {
            "questionId": "451",
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            "categoryTitle": "Algorithms",
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            "title": "Sort Characters By Frequency",
            "titleSlug": "sort-characters-by-frequency",
            "content": "<p>Given a string <code>s</code>, sort it in <strong>decreasing order</strong> based on the <strong>frequency</strong> of the characters. The <strong>frequency</strong> of a character is the number of times it appears in the string.</p>\n\n<p>Return <em>the sorted string</em>. If there are multiple answers, return <em>any of them</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;tree&quot;\n<strong>Output:</strong> &quot;eert&quot;\n<strong>Explanation:</strong> &#39;e&#39; appears twice while &#39;r&#39; and &#39;t&#39; both appear once.\nSo &#39;e&#39; must appear before both &#39;r&#39; and &#39;t&#39;. Therefore &quot;eetr&quot; is also a valid answer.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;cccaaa&quot;\n<strong>Output:</strong> &quot;aaaccc&quot;\n<strong>Explanation:</strong> Both &#39;c&#39; and &#39;a&#39; appear three times, so both &quot;cccaaa&quot; and &quot;aaaccc&quot; are valid answers.\nNote that &quot;cacaca&quot; is incorrect, as the same characters must be together.\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> s = &quot;Aabb&quot;\n<strong>Output:</strong> &quot;bbAa&quot;\n<strong>Explanation:</strong> &quot;bbaA&quot; is also a valid answer, but &quot;Aabb&quot; is incorrect.\nNote that &#39;A&#39; and &#39;a&#39; are treated as two different characters.\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;= 5 * 10<sup>5</sup></code></li>\n\t<li><code>s</code> consists of uppercase and lowercase English letters and digits.</li>\n</ul>\n",
            "translatedTitle": "根据字符出现频率排序",
            "translatedContent": "<p>给定一个字符串 <code>s</code> ，根据字符出现的 <strong>频率</strong> 对其进行 <strong>降序排序</strong> 。一个字符出现的 <strong>频率</strong> 是它出现在字符串中的次数。</p>\n\n<p>返回 <em>已排序的字符串&nbsp;</em>。如果有多个答案，返回其中任何一个。</p>\n\n<p>&nbsp;</p>\n\n<p><strong class=\"example\">示例 1:</strong></p>\n\n<pre>\n<strong>输入: </strong>s = \"tree\"\n<strong>输出: </strong>\"eert\"\n<strong>解释: </strong>'e'出现两次，'r'和't'都只出现一次。\n因此'e'必须出现在'r'和't'之前。此外，\"eetr\"也是一个有效的答案。\n</pre>\n\n<p><strong class=\"example\">示例 2:</strong></p>\n\n<pre>\n<strong>输入: </strong>s = \"cccaaa\"\n<strong>输出: </strong>\"cccaaa\"\n<strong>解释: </strong>'c'和'a'都出现三次。此外，\"aaaccc\"也是有效的答案。\n注意\"cacaca\"是不正确的，因为相同的字母必须放在一起。\n</pre>\n\n<p><strong class=\"example\">示例 3:</strong></p>\n\n<pre>\n<strong>输入: </strong>s = \"Aabb\"\n<strong>输出: </strong>\"bbAa\"\n<strong>解释: </strong>此外，\"bbaA\"也是一个有效的答案，但\"Aabb\"是不正确的。\n注意'A'和'a'被认为是两种不同的字符。\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;= 5 * 10<sup>5</sup></code></li>\n\t<li><code>s</code>&nbsp;由大小写英文字母和数字组成</li>\n</ul>\n",
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