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"translatedContent": "<p>编写一个算法来判断一个数 <code>n</code> 是不是快乐数。</p>\n\n<p><strong>「快乐数」</strong>&nbsp;定义为:</p>\n\n<ul>\n\t<li>对于一个正整数,每一次将该数替换为它每个位置上的数字的平方和。</li>\n\t<li>然后重复这个过程直到这个数变为 1也可能是 <strong>无限循环</strong> 但始终变不到 1。</li>\n\t<li>如果这个过程 <strong>结果为</strong>&nbsp;1那么这个数就是快乐数。</li>\n</ul>\n\n<p>如果 <code>n</code> 是 <em>快乐数</em> 就返回 <code>true</code> ;不是,则返回 <code>false</code> 。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1</strong></p>\n\n<pre>\n<strong>输入:</strong>n = 19\n<strong>输出:</strong>true\n<strong>解释:\n</strong>1<sup>2</sup> + 9<sup>2</sup> = 82\n8<sup>2</sup> + 2<sup>2</sup> = 68\n6<sup>2</sup> + 8<sup>2</sup> = 100\n1<sup>2</sup> + 0<sup>2</sup> + 0<sup>2</sup> = 1\n</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre>\n<strong>输入:</strong>n = 2\n<strong>输出:</strong>false\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= n &lt;= 2<sup>31</sup> - 1</code></li>\n</ul>\n",
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"difficulty": "Easy",
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"similarQuestions": "[{\"title\": \"Linked List Cycle\", \"titleSlug\": \"linked-list-cycle\", \"difficulty\": \"Easy\", \"translatedTitle\": \"\\u73af\\u5f62\\u94fe\\u8868\"}, {\"title\": \"Add Digits\", \"titleSlug\": \"add-digits\", \"difficulty\": \"Easy\", \"translatedTitle\": \"\\u5404\\u4f4d\\u76f8\\u52a0\"}, {\"title\": \"Ugly Number\", \"titleSlug\": \"ugly-number\", \"difficulty\": \"Easy\", \"translatedTitle\": \"\\u4e11\\u6570\"}]",
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