leetcode-problemset/leetcode-cn/originData/maximum-length-of-pair-chain.json

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            "title": "Maximum Length of Pair Chain",
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            "content": "<p>You are given an array of <code>n</code> pairs <code>pairs</code> where <code>pairs[i] = [left<sub>i</sub>, right<sub>i</sub>]</code> and <code>left<sub>i</sub> &lt; right<sub>i</sub></code>.</p>\n\n<p>A pair <code>p2 = [c, d]</code> <strong>follows</strong> a pair <code>p1 = [a, b]</code> if <code>b &lt; c</code>. A <strong>chain</strong> of pairs can be formed in this fashion.</p>\n\n<p>Return <em>the length longest chain which can be formed</em>.</p>\n\n<p>You do not need to use up all the given intervals. You can select pairs in any order.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> pairs = [[1,2],[2,3],[3,4]]\n<strong>Output:</strong> 2\n<strong>Explanation:</strong> The longest chain is [1,2] -&gt; [3,4].\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> pairs = [[1,2],[7,8],[4,5]]\n<strong>Output:</strong> 3\n<strong>Explanation:</strong> The longest chain is [1,2] -&gt; [4,5] -&gt; [7,8].\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == pairs.length</code></li>\n\t<li><code>1 &lt;= n &lt;= 1000</code></li>\n\t<li><code>-1000 &lt;= left<sub>i</sub> &lt; right<sub>i</sub> &lt;= 1000</code></li>\n</ul>\n",
            "translatedTitle": "最长数对链",
            "translatedContent": "<p>给你一个由&nbsp;<code>n</code>&nbsp;个数对组成的数对数组&nbsp;<code>pairs</code>&nbsp;，其中&nbsp;<code>pairs[i] = [left<sub>i</sub>, right<sub>i</sub>]</code>&nbsp;且&nbsp;<code>left<sub>i</sub>&nbsp;&lt; right<sub>i</sub></code><sub> 。</sub></p>\n\n<p>现在，我们定义一种 <strong>跟随</strong> 关系，当且仅当&nbsp;<code>b &lt; c</code>&nbsp;时，数对&nbsp;<code>p2 = [c, d]</code>&nbsp;才可以跟在&nbsp;<code>p1 = [a, b]</code>&nbsp;后面。我们用这种形式来构造 <strong>数对链</strong> 。</p>\n\n<p>找出并返回能够形成的 <strong>最长数对链的长度</strong> 。</p>\n\n<p>你不需要用到所有的数对，你可以以任何顺序选择其中的一些数对来构造。</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入：</strong>pairs =&nbsp;[[1,2], [2,3], [3,4]]\n<strong>输出：</strong>2\n<strong>解释：</strong>最长的数对链是 [1,2] -&gt; [3,4] 。\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<b>输入：</b>pairs = [[1,2],[7,8],[4,5]]\n<b>输出：</b>3\n<b>解释：</b>最长的数对链是 [1,2] -&gt; [4,5] -&gt; [7,8] 。</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>n == pairs.length</code></li>\n\t<li><code>1 &lt;= n &lt;= 1000</code></li>\n\t<li><code>-1000 &lt;= left<sub>i</sub>&nbsp;&lt; right<sub>i</sub>&nbsp;&lt;= 1000</code></li>\n</ul>\n",
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