leetcode-problemset/leetcode-cn/originData/minimum-number-of-frogs-croaking.json

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        "question": {
            "questionId": "1534",
            "questionFrontendId": "1419",
            "categoryTitle": "Algorithms",
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            "title": "Minimum Number of Frogs Croaking",
            "titleSlug": "minimum-number-of-frogs-croaking",
            "content": "<p>You are given the string <code>croakOfFrogs</code>, which represents a combination of the string <code>&quot;croak&quot;</code> from different frogs, that is, multiple frogs can croak at the same time, so multiple <code>&quot;croak&quot;</code> are mixed.</p>\n\n<p><em>Return the minimum number of </em>different<em> frogs to finish all the croaks in the given string.</em></p>\n\n<p>A valid <code>&quot;croak&quot;</code> means a frog is printing five letters <code>&#39;c&#39;</code>, <code>&#39;r&#39;</code>, <code>&#39;o&#39;</code>, <code>&#39;a&#39;</code>, and <code>&#39;k&#39;</code> <strong>sequentially</strong>. The frogs have to print all five letters to finish a croak. If the given string is not a combination of a valid <code>&quot;croak&quot;</code> return <code>-1</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> croakOfFrogs = &quot;croakcroak&quot;\n<strong>Output:</strong> 1 \n<strong>Explanation:</strong> One frog yelling &quot;croak<strong>&quot;</strong> twice.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> croakOfFrogs = &quot;crcoakroak&quot;\n<strong>Output:</strong> 2 \n<strong>Explanation:</strong> The minimum number of frogs is two. \nThe first frog could yell &quot;<strong>cr</strong>c<strong>oak</strong>roak&quot;.\nThe second frog could yell later &quot;cr<strong>c</strong>oak<strong>roak</strong>&quot;.\n</pre>\n\n<p><strong>Example 3:</strong></p>\n\n<pre>\n<strong>Input:</strong> croakOfFrogs = &quot;croakcrook&quot;\n<strong>Output:</strong> -1\n<strong>Explanation:</strong> The given string is an invalid combination of &quot;croak<strong>&quot;</strong> from different frogs.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= croakOfFrogs.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>croakOfFrogs</code> is either <code>&#39;c&#39;</code>, <code>&#39;r&#39;</code>, <code>&#39;o&#39;</code>, <code>&#39;a&#39;</code>, or <code>&#39;k&#39;</code>.</li>\n</ul>\n",
            "translatedTitle": "数青蛙",
            "translatedContent": "<p>给你一个字符串 <code>croakOfFrogs</code>，它表示不同青蛙发出的蛙鸣声（字符串 <code>\"croak\"</code> ）的组合。由于同一时间可以有多只青蛙呱呱作响，所以&nbsp;<code>croakOfFrogs</code> 中会混合多个 <code>“croak”</code> <em>。</em></p>\n\n<p>请你返回模拟字符串中所有蛙鸣所需不同青蛙的最少数目。</p>\n\n<p>要想发出蛙鸣 \"croak\"，青蛙必须 <strong>依序</strong> 输出 <code>‘c’, ’r’, ’o’, ’a’, ’k’</code> 这 5 个字母。如果没有输出全部五个字母，那么它就不会发出声音。如果字符串 <code>croakOfFrogs</code> 不是由若干有效的 \"croak\" 字符混合而成，请返回 <code>-1</code> 。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>croakOfFrogs = \"croakcroak\"\n<strong>输出：</strong>1 \n<strong>解释：</strong>一只青蛙 “呱呱” 两次\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>croakOfFrogs = \"crcoakroak\"\n<strong>输出：</strong>2 \n<strong>解释：</strong>最少需要两只青蛙，“呱呱” 声用黑体标注\n第一只青蛙 \"<strong>cr</strong>c<strong>oak</strong>roak\"\n第二只青蛙 \"cr<strong>c</strong>oak<strong>roak</strong>\"\n</pre>\n\n<p><strong>示例 3：</strong></p>\n\n<pre>\n<strong>输入：</strong>croakOfFrogs = \"croakcrook\"\n<strong>输出：</strong>-1\n<strong>解释：</strong>给出的字符串不是 \"croak<strong>\"</strong> 的有效组合。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= croakOfFrogs.length &lt;= 10<sup>5</sup></code></li>\n\t<li>字符串中的字符只有 <code>'c'</code>, <code>'r'</code>, <code>'o'</code>, <code>'a'</code> 或者 <code>'k'</code></li>\n</ul>\n",
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