leetcode-problemset/leetcode-cn/originData/alternating-groups-i.json

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        "question": {
            "questionId": "3463",
            "questionFrontendId": "3206",
            "categoryTitle": "Algorithms",
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            "title": "Alternating Groups I",
            "titleSlug": "alternating-groups-i",
            "content": "<p>There is a circle of red and blue tiles. You are given an array of integers <code>colors</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>Every 3 contiguous tiles in the circle with <strong>alternating</strong> colors (the middle tile has a different color from its <strong>left</strong> and <strong>right</strong> tiles) is called an <strong>alternating</strong> group.</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 = [1,1,1]</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=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-53-171.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></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]</span></p>\n\n<p><strong>Output:</strong> 3</p>\n\n<p><strong>Explanation:</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-47-491.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></p>\n\n<p>Alternating groups:</p>\n\n<p><strong class=\"example\"><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-50-441.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></strong><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-48-211.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /><strong class=\"example\"><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-49-351.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></strong></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;= 100</code></li>\n\t<li><code>0 &lt;= colors[i] &lt;= 1</code></li>\n</ul>\n",
            "translatedTitle": "交替组 I",
            "translatedContent": "<p>给你一个整数数组 <code>colors</code>&nbsp;，它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 3 块瓷砖的颜色如果是 <strong>交替</strong>&nbsp;颜色（也就是说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 = [1,1,1]</span></p>\n\n<p><span class=\"example-io\"><b>输出：</b>0</span></p>\n\n<p><strong>解释：</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-53-171.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></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]</span></p>\n\n<p><b>输出：</b>3</p>\n\n<p><b>解释：</b></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-47-491.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/2024/05/16/image_2024-05-16_23-50-441.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></strong><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-48-211.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /><strong class=\"example\"><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2024/05/16/image_2024-05-16_23-49-351.png\" style=\"width: 150px; height: 150px; padding: 10px; background: #fff; border-radius: .5rem;\" /></strong></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;= 100</code></li>\n\t<li><code>0 &lt;= colors[i] &lt;= 1</code></li>\n</ul>\n",
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