leetcode-problemset/leetcode-cn/originData/student-attendance-record-ii.json

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            "title": "Student Attendance Record II",
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            "content": "<p>An attendance record for a student can be represented as a string where each character signifies whether the student was absent, late, or present on that day. The record only contains the following three characters:</p>\n\n<ul>\n\t<li><code>&#39;A&#39;</code>: Absent.</li>\n\t<li><code>&#39;L&#39;</code>: Late.</li>\n\t<li><code>&#39;P&#39;</code>: Present.</li>\n</ul>\n\n<p>Any student is eligible for an attendance award if they meet <strong>both</strong> of the following criteria:</p>\n\n<ul>\n\t<li>The student was absent (<code>&#39;A&#39;</code>) for <strong>strictly</strong> fewer than 2 days <strong>total</strong>.</li>\n\t<li>The student was <strong>never</strong> late (<code>&#39;L&#39;</code>) for 3 or more <strong>consecutive</strong> days.</li>\n</ul>\n\n<p>Given an integer <code>n</code>, return <em>the <strong>number</strong> of possible attendance records of length</em> <code>n</code><em> that make a student eligible for an attendance award. The answer may be very large, so return it <strong>modulo</strong> </em><code>10<sup>9</sup> + 7</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 2\n<strong>Output:</strong> 8\n<strong>Explanation:</strong> There are 8 records with length 2 that are eligible for an award:\n&quot;PP&quot;, &quot;AP&quot;, &quot;PA&quot;, &quot;LP&quot;, &quot;PL&quot;, &quot;AL&quot;, &quot;LA&quot;, &quot;LL&quot;\nOnly &quot;AA&quot; is not eligible because there are 2 absences (there need to be fewer than 2).\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 1\n<strong>Output:</strong> 3\n</pre>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 10101\n<strong>Output:</strong> 183236316\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= n &lt;= 10<sup>5</sup></code></li>\n</ul>\n",
            "translatedTitle": "学生出勤记录 II",
            "translatedContent": "可以用字符串表示一个学生的出勤记录，其中的每个字符用来标记当天的出勤情况（缺勤、迟到、到场）。记录中只含下面三种字符：\n<ul>\n\t<li><code>'A'</code>：Absent，缺勤</li>\n\t<li><code>'L'</code>：Late，迟到</li>\n\t<li><code>'P'</code>：Present，到场</li>\n</ul>\n\n<p>如果学生能够 <strong>同时</strong> 满足下面两个条件，则可以获得出勤奖励：</p>\n\n<ul>\n\t<li>按 <strong>总出勤</strong> 计，学生缺勤（<code>'A'</code>）<strong>严格</strong> 少于两天。</li>\n\t<li>学生 <strong>不会</strong> 存在 <strong>连续</strong> 3 天或 <strong>连续</strong> 3 天以上的迟到（<code>'L'</code>）记录。</li>\n</ul>\n\n<p>给你一个整数 <code>n</code> ，表示出勤记录的长度（次数）。请你返回记录长度为 <code>n</code> 时，可能获得出勤奖励的记录情况 <strong>数量</strong> 。答案可能很大，所以返回对 <code>10<sup>9</sup> + 7</code> <strong>取余</strong> 的结果。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>n = 2\n<strong>输出：</strong>8\n<strong>解释：\n</strong>有 8 种长度为 2 的记录将被视为可奖励：\n\"PP\" , \"AP\", \"PA\", \"LP\", \"PL\", \"AL\", \"LA\", \"LL\" \n只有\"AA\"不会被视为可奖励，因为缺勤次数为 2 次（需要少于 2 次）。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>n = 1\n<strong>输出：</strong>3\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>n = 10101\n<strong>输出：</strong>183236316\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;= 10<sup>5</sup></code></li>\n</ul>\n",
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