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UlBDOe.json
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{
"data": {
"question": {
"questionId": "1000130",
"questionFrontendId": "LCP 19",
"categoryTitle": "Algorithms",
"boundTopicId": 383900,
"title": "秋叶收藏集",
"titleSlug": "UlBDOe",
"content": "",
"translatedTitle": "秋叶收藏集",
"translatedContent": "小扣出去秋游，途中收集了一些红叶和黄叶，他利用这些叶子初步整理了一份秋叶收藏集 `leaves`， 字符串 `leaves` 仅包含小写字符 `r` 和 `y`， 其中字符 `r` 表示一片红叶，字符 `y` 表示一片黄叶。\r\n出于美观整齐的考虑，小扣想要将收藏集中树叶的排列调整成「红、黄、红」三部分。每部分树叶数量可以不相等，但均需大于等于 1。每次调整操作，小扣可以将一片红叶替换成黄叶或者将一片黄叶替换成红叶。请问小扣最少需要多少次调整操作才能将秋叶收藏集调整完毕。\r\n\r\n**示例 1：**\r\n>输入：`leaves = \"rrryyyrryyyrr\"`\r\n>\r\n>输出：`2`\r\n>\r\n>解释：调整两次，将中间的两片红叶替换成黄叶，得到 \"rrryyyyyyyyrr\"\r\n\r\n**示例 2：**\r\n>输入：`leaves = \"ryr\"`\r\n>\r\n>输出：`0`\r\n>\r\n>解释：已符合要求，不需要额外操作\r\n\r\n**提示：**\r\n- `3 <= leaves.length <= 10^5`\r\n- `leaves` 中只包含字符 `'r'` 和字符 `'y'`",
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