leetcode-problemset/leetcode-cn/originData/unique-binary-search-trees.json

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            "title": "Unique Binary Search Trees",
            "titleSlug": "unique-binary-search-trees",
            "content": "<p>Given an integer <code>n</code>, return <em>the number of structurally unique <strong>BST&#39;</strong>s (binary search trees) which has exactly </em><code>n</code><em> nodes of unique values from</em> <code>1</code> <em>to</em> <code>n</code>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/01/18/uniquebstn3.jpg\" style=\"width: 600px; height: 148px;\" />\n<pre>\n<strong>Input:</strong> n = 3\n<strong>Output:</strong> 5\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 1\n<strong>Output:</strong> 1\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= n &lt;= 19</code></li>\n</ul>\n",
            "translatedTitle": "不同的二叉搜索树",
            "translatedContent": "<p>给你一个整数 <code>n</code> ，求恰由 <code>n</code> 个节点组成且节点值从 <code>1</code> 到 <code>n</code> 互不相同的 <strong>二叉搜索树</strong> 有多少种？返回满足题意的二叉搜索树的种数。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2021/01/18/uniquebstn3.jpg\" style=\"width: 600px; height: 148px;\" />\n<pre>\n<strong>输入：</strong>n = 3\n<strong>输出：</strong>5\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n<strong>输入：</strong>n = 1\n<strong>输出：</strong>1\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 <= n <= 19</code></li>\n</ul>\n",
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