leetcode-problemset/leetcode-cn/originData/happy-number.json

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            "categoryTitle": "Algorithms",
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            "title": "Happy Number",
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            "content": "<p>Write an algorithm to determine if a number <code>n</code> is happy.</p>\n\n<p>A <strong>happy number</strong> is a number defined by the following process:</p>\n\n<ul>\n\t<li>Starting with any positive integer, replace the number by the sum of the squares of its digits.</li>\n\t<li>Repeat the process until the number equals 1 (where it will stay), or it <strong>loops endlessly in a cycle</strong> which does not include 1.</li>\n\t<li>Those numbers for which this process <strong>ends in 1</strong> are happy.</li>\n</ul>\n\n<p>Return <code>true</code> <em>if</em> <code>n</code> <em>is a happy number, and</em> <code>false</code> <em>if not</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 19\n<strong>Output:</strong> true\n<strong>Explanation:</strong>\n1<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 class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 2\n<strong>Output:</strong> false\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= n &lt;= 2<sup>31</sup> - 1</code></li>\n</ul>\n",
            "translatedTitle": "快乐数",
            "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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