leetcode-problemset/leetcode-cn/originData/couples-holding-hands.json

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            "title": "Couples Holding Hands",
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            "content": "<p>There are <code>n</code> couples sitting in <code>2n</code> seats arranged in a row and want to hold hands.</p>\n\n<p>The people and seats are represented by an integer array <code>row</code> where <code>row[i]</code> is the ID of the person sitting in the <code>i<sup>th</sup></code> seat. The couples are numbered in order, the first couple being <code>(0, 1)</code>, the second couple being <code>(2, 3)</code>, and so on with the last couple being <code>(2n - 2, 2n - 1)</code>.</p>\n\n<p>Return <em>the minimum number of swaps so that every couple is sitting side by side</em>. A swap consists of choosing any two people, then they stand up and switch seats.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> row = [0,2,1,3]\n<strong>Output:</strong> 1\n<strong>Explanation:</strong> We only need to swap the second (row[1]) and third (row[2]) person.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> row = [3,2,0,1]\n<strong>Output:</strong> 0\n<strong>Explanation:</strong> All couples are already seated side by side.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>2n == row.length</code></li>\n\t<li><code>2 &lt;= n &lt;= 30</code></li>\n\t<li><code>n</code> is even.</li>\n\t<li><code>0 &lt;= row[i] &lt; 2n</code></li>\n\t<li>All the elements of <code>row</code> are <strong>unique</strong>.</li>\n</ul>\n",
            "translatedTitle": "情侣牵手",
            "translatedContent": "<p><code>n</code> 对情侣坐在连续排列的 <code>2n</code>&nbsp;个座位上，想要牵到对方的手。</p>\n\n<p>人和座位由一个整数数组 <code>row</code> 表示，其中 <code>row[i]</code> 是坐在第 <code>i </code>个座位上的人的 <strong>ID</strong>。情侣们按顺序编号，第一对是&nbsp;<code>(0, 1)</code>，第二对是&nbsp;<code>(2, 3)</code>，以此类推，最后一对是&nbsp;<code>(2n-2, 2n-1)</code>。</p>\n\n<p>返回 <em>最少交换座位的次数，以便每对情侣可以并肩坐在一起</em>。 <i>每次</i>交换可选择任意两人，让他们站起来交换座位。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1:</strong></p>\n\n<pre>\n<strong>输入:</strong> row = [0,2,1,3]\n<strong>输出:</strong> 1\n<strong>解释:</strong> 只需要交换row[1]和row[2]的位置即可。\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<strong>输入:</strong> row = [3,2,0,1]\n<strong>输出:</strong> 0\n<strong>解释:</strong> 无需交换座位，所有的情侣都已经可以手牵手了。\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>2n == row.length</code></li>\n\t<li><code>2 &lt;= n &lt;= 30</code></li>\n\t<li><code>n</code>&nbsp;是偶数</li>\n\t<li><code>0 &lt;= row[i] &lt; 2n</code></li>\n\t<li><code>row</code>&nbsp;中所有元素均<strong>无重复</strong></li>\n</ul>\n",
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