leetcode-problemset/leetcode-cn/originData/count-number-of-homogenous-substrings.json

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        "question": {
            "questionId": "1885",
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            "categoryTitle": "Algorithms",
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            "title": "Count Number of Homogenous Substrings",
            "titleSlug": "count-number-of-homogenous-substrings",
            "content": "<p>Given a string <code>s</code>, return <em>the number of <strong>homogenous</strong> substrings of </em><code>s</code><em>.</em> Since the answer may be too large, return it <strong>modulo</strong> <code>10<sup>9</sup> + 7</code>.</p>\r\n\r\n<p>A string is <strong>homogenous</strong> if all the characters of the string are the same.</p>\r\n\r\n<p>A <strong>substring</strong> is a contiguous sequence of characters within a string.</p>\r\n\r\n<p>&nbsp;</p>\r\n<p><strong>Example 1:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> s = &quot;abbcccaa&quot;\r\n<strong>Output:</strong> 13\r\n<strong>Explanation:</strong> The homogenous substrings are listed as below:\r\n&quot;a&quot;   appears 3 times.\r\n&quot;aa&quot;  appears 1 time.\r\n&quot;b&quot;   appears 2 times.\r\n&quot;bb&quot;  appears 1 time.\r\n&quot;c&quot;   appears 3 times.\r\n&quot;cc&quot;  appears 2 times.\r\n&quot;ccc&quot; appears 1 time.\r\n3 + 1 + 2 + 1 + 3 + 2 + 1 = 13.</pre>\r\n\r\n<p><strong>Example 2:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> s = &quot;xy&quot;\r\n<strong>Output:</strong> 2\r\n<strong>Explanation:</strong> The homogenous substrings are &quot;x&quot; and &quot;y&quot;.</pre>\r\n\r\n<p><strong>Example 3:</strong></p>\r\n\r\n<pre>\r\n<strong>Input:</strong> s = &quot;zzzzz&quot;\r\n<strong>Output:</strong> 15\r\n</pre>\r\n\r\n<p>&nbsp;</p>\r\n<p><strong>Constraints:</strong></p>\r\n\r\n<ul>\r\n\t<li><code>1 &lt;= s.length &lt;= 10<sup>5</sup></code></li>\r\n\t<li><code>s</code> consists of lowercase letters.</li>\r\n</ul>",
            "translatedTitle": "统计同构子字符串的数目",
            "translatedContent": "<p>给你一个字符串 <code>s</code> ，返回<em> </em><code>s</code><em> </em>中 <strong>同构子字符串</strong> 的数目。由于答案可能很大，只需返回对 <code>10<sup>9</sup> + 7</code> <strong>取余 </strong>后的结果。</p>\n\n<p><strong>同构字符串</strong> 的定义为：如果一个字符串中的所有字符都相同，那么该字符串就是同构字符串。</p>\n\n<p><strong>子字符串</strong> 是字符串中的一个连续字符序列。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre><strong>输入：</strong>s = \"abbcccaa\"\n<strong>输出：</strong>13\n<strong>解释：</strong>同构子字符串如下所列：\n\"a\"   出现 3 次。\n\"aa\"  出现 1 次。\n\"b\"   出现 2 次。\n\"bb\"  出现 1 次。\n\"c\"   出现 3 次。\n\"cc\"  出现 2 次。\n\"ccc\" 出现 1 次。\n3 + 1 + 2 + 1 + 3 + 2 + 1 = 13</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre><strong>输入：</strong>s = \"xy\"\n<strong>输出：</strong>2\n<strong>解释：</strong>同构子字符串是 \"x\" 和 \"y\" 。</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre><strong>输入：</strong>s = \"zzzzz\"\n<strong>输出：</strong>15\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</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> 由小写字符串组成</li>\n</ul>\n",
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