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    "data": {
        "question": {
            "questionId": "3483",
            "questionFrontendId": "3208",
            "categoryTitle": "Algorithms",
            "boundTopicId": 2830872,
            "title": "Alternating Groups II",
            "titleSlug": "alternating-groups-ii",
            "content": "<p>There is a circle of red and blue tiles. You are given an array of integers <code>colors</code> and an integer <code>k</code>. The color of tile <code>i</code> is represented by <code>colors[i]</code>:</p>\n\n<ul>\n\t<li><code>colors[i] == 0</code> means that tile <code>i</code> is <strong>red</strong>.</li>\n\t<li><code>colors[i] == 1</code> means that tile <code>i</code> is <strong>blue</strong>.</li>\n</ul>\n\n<p>An <strong>alternating</strong> group is every <code>k</code> contiguous tiles in the circle with <strong>alternating</strong> colors (each tile in the group except the first and last one has a different color from its <strong>left</strong> and <strong>right</strong> tiles).</p>\n\n<p>Return the number of <strong>alternating</strong> groups.</p>\n\n<p><strong>Note</strong> that since <code>colors</code> represents a <strong>circle</strong>, the <strong>first</strong> and the <strong>last</strong> tiles are considered to be next to each other.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">colors = [0,1,0,1,0], k = 3</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">3</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p><strong><img alt=\"\" data-darkreader-inline-bgcolor=\"\" data-darkreader-inline-bgimage=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-183519.png\" style=\"width: 150px; height: 150px; padding: 10px; background: rgb(255, 255, 255); border-radius: 0.5rem; --darkreader-inline-bgimage: initial; --darkreader-inline-bgcolor: #181a1b;\" /></strong></p>\n\n<p>Alternating groups:</p>\n\n<p><img alt=\"\" data-darkreader-inline-bgcolor=\"\" data-darkreader-inline-bgimage=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/28/screenshot-2024-05-28-182448.png\" style=\"width: 150px; height: 150px; padding: 10px; background: rgb(255, 255, 255); border-radius: 0.5rem; --darkreader-inline-bgimage: initial; --darkreader-inline-bgcolor: #181a1b;\" /><img alt=\"\" data-darkreader-inline-bgcolor=\"\" data-darkreader-inline-bgimage=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/28/screenshot-2024-05-28-182844.png\" style=\"width: 150px; height: 150px; padding: 10px; background: rgb(255, 255, 255); border-radius: 0.5rem; --darkreader-inline-bgimage: initial; --darkreader-inline-bgcolor: #181a1b;\" /><img alt=\"\" data-darkreader-inline-bgcolor=\"\" data-darkreader-inline-bgimage=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/28/screenshot-2024-05-28-183057.png\" style=\"width: 150px; height: 150px; padding: 10px; background: rgb(255, 255, 255); border-radius: 0.5rem; --darkreader-inline-bgimage: initial; --darkreader-inline-bgcolor: #181a1b;\" /></p>\n</div>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">colors = [0,1,0,0,1,0,1], k = 6</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">2</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p><strong><img alt=\"\" data-darkreader-inline-bgcolor=\"\" data-darkreader-inline-bgimage=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-183907.png\" style=\"width: 150px; height: 150px; padding: 10px; background: rgb(255, 255, 255); border-radius: 0.5rem; --darkreader-inline-bgimage: initial; --darkreader-inline-bgcolor: #181a1b;\" /></strong></p>\n\n<p>Alternating groups:</p>\n\n<p><img alt=\"\" data-darkreader-inline-bgcolor=\"\" data-darkreader-inline-bgimage=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-184128.png\" style=\"width: 150px; height: 150px; padding: 10px; background: rgb(255, 255, 255); border-radius: 0.5rem; --darkreader-inline-bgimage: initial; --darkreader-inline-bgcolor: #181a1b;\" /><img alt=\"\" data-darkreader-inline-bgcolor=\"\" data-darkreader-inline-bgimage=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-184240.png\" style=\"width: 150px; height: 150px; padding: 10px; background: rgb(255, 255, 255); border-radius: 0.5rem; --darkreader-inline-bgimage: initial; --darkreader-inline-bgcolor: #181a1b;\" /></p>\n</div>\n\n<p><strong class=\"example\">Example 3:</strong></p>\n\n<div class=\"example-block\">\n<p><strong>Input:</strong> <span class=\"example-io\">colors = [1,1,0,1], k = 4</span></p>\n\n<p><strong>Output:</strong> <span class=\"example-io\">0</span></p>\n\n<p><strong>Explanation:</strong></p>\n\n<p><img alt=\"\" data-darkreader-inline-bgcolor=\"\" data-darkreader-inline-bgimage=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-184516.png\" style=\"width: 150px; height: 150px; padding: 10px; background: rgb(255, 255, 255); border-radius: 0.5rem; --darkreader-inline-bgimage: initial; --darkreader-inline-bgcolor: #181a1b;\" /></p>\n</div>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>3 &lt;= colors.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>0 &lt;= colors[i] &lt;= 1</code></li>\n\t<li><code>3 &lt;= k &lt;= colors.length</code></li>\n</ul>\n",
            "translatedTitle": "交替组 II",
            "translatedContent": "<p>给你一个整数数组 <code>colors</code>&nbsp;和一个整数&nbsp;<code>k</code>&nbsp;，<code>colors</code>表示一个由红色和蓝色瓷砖组成的环，第 <code>i</code>&nbsp;块瓷砖的颜色为&nbsp;<code>colors[i]</code>&nbsp;：</p>\n\n<ul>\n\t<li><code>colors[i] == 0</code>&nbsp;表示第&nbsp;<code>i</code>&nbsp;块瓷砖的颜色是 <strong>红色</strong>&nbsp;。</li>\n\t<li><code>colors[i] == 1</code>&nbsp;表示第 <code>i</code>&nbsp;块瓷砖的颜色是 <strong>蓝色</strong>&nbsp;。</li>\n</ul>\n\n<p>环中连续 <code>k</code>&nbsp;块瓷砖的颜色如果是 <strong>交替</strong>&nbsp;颜色（也就是说除了第一块和最后一块瓷砖以外，中间瓷砖的颜色与它<strong>&nbsp;左边</strong>&nbsp;和 <strong>右边</strong>&nbsp;的颜色都不同），那么它被称为一个 <strong>交替</strong>&nbsp;组。</p>\n\n<p>请你返回 <strong>交替</strong>&nbsp;组的数目。</p>\n\n<p><b>注意</b>&nbsp;，由于&nbsp;<code>colors</code>&nbsp;表示一个 <strong>环</strong>&nbsp;，<strong>第一块</strong>&nbsp;瓷砖和 <strong>最后一块</strong>&nbsp;瓷砖是相邻的。</p>\n\n<p>&nbsp;</p>\n\n<p><strong class=\"example\">示例 1：</strong></p>\n\n<div class=\"example-block\">\n<p><span class=\"example-io\"><b>输入：</b>colors = [0,1,0,1,0], k = 3</span></p>\n\n<p><span class=\"example-io\"><b>输出：</b>3</span></p>\n\n<p><strong>解释：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-183519.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></p>\n\n<p>交替组包括：</p>\n\n<p><strong class=\"example\"><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/28/screenshot-2024-05-28-182448.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></strong><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/28/screenshot-2024-05-28-182844.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /><strong class=\"example\"><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/28/screenshot-2024-05-28-183057.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></strong></p>\n</div>\n\n<p><strong class=\"example\">示例 2：</strong></p>\n\n<div class=\"example-block\">\n<p><span class=\"example-io\"><b>输入：</b>colors = [0,1,0,0,1,0,1], k = 6</span></p>\n\n<p><b>输出：</b>2</p>\n\n<p><b>解释：</b></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-183907.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></p>\n\n<p>交替组包括：</p>\n\n<p><strong class=\"example\"><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-184128.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></strong><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-184240.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></p>\n\n<p><strong>示例 3：</strong></p>\n\n<p><strong>输入：</strong>colors = [1,1,0,1], k = 4</p>\n\n<p><strong>输出：</strong>0</p>\n\n<p><strong>解释：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/06/19/screenshot-2024-05-28-184516.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></p>\n</div>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>3 &lt;= colors.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>0 &lt;= colors[i] &lt;= 1</code></li>\n\t<li><code>3 &lt;= k &lt;= colors.length</code></li>\n</ul>\n",
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<code>out-of-bounds<\\/code> \\u548c <code>use-after-free<\\/code> \\u9519\\u8bef\\u3002<\\/p>\\r\\n\\r\\n<p>\\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n<p>\\u5982\\u60f3\\u4f7f\\u7528\\u54c8\\u5e0c\\u8868\\u8fd0\\u7b97, \\u60a8\\u53ef\\u4ee5\\u4f7f\\u7528 <a href=\\\"https:\\/\\/troydhanson.github.io\\/uthash\\/\\\" target=\\\"_blank\\\">uthash<\\/a>\\u3002 \\\"uthash.h\\\"\\u5df2\\u7ecf\\u9ed8\\u8ba4\\u88ab\\u5bfc\\u5165\\u3002\\u8bf7\\u770b\\u5982\\u4e0b\\u793a\\u4f8b:<\\/p>\\r\\n\\r\\n<p><b>1. \\u5f80\\u54c8\\u5e0c\\u8868\\u4e2d\\u6dfb\\u52a0\\u4e00\\u4e2a\\u5bf9\\u8c61\\uff1a<\\/b>\\r\\n<pre>\\r\\nstruct hash_entry {\\r\\n    int id;            \\/* we'll use this field as the key *\\/\\r\\n    char name[10];\\r\\n    UT_hash_handle hh; \\/* makes this structure hashable *\\/\\r\\n};\\r\\n\\r\\nstruct hash_entry *users = 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