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3 | 3 | | [95. 不同的二叉搜索树 II](https://leetcode.cn/problems/unique-binary-search-trees-ii/) | [LeetCode 题解链接](https://www.acoier.com/2022/12/09/95.%20%E4%B8%8D%E5%90%8C%E7%9A%84%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%20II%EF%BC%88%E4%B8%AD%E7%AD%89%EF%BC%89/) | 中等 | 🤩🤩🤩🤩 | |
4 | 4 | | [113. 路径总和 II](https://leetcode.cn/problems/path-sum-ii/) | [LeetCode 题解链接](https://acoier.com/2022/12/10/113.%20%E8%B7%AF%E5%BE%84%E6%80%BB%E5%92%8C%20II%EF%BC%88%E4%B8%AD%E7%AD%89%EF%BC%89/) | 中等 | 🤩🤩🤩🤩 | |
5 | 5 | | [230. 二叉搜索树中第K小的元素](https://leetcode-cn.com/problems/kth-smallest-element-in-a-bst/) | [LeetCode 题解链接](https://leetcode-cn.com/problems/kth-smallest-element-in-a-bst/solution/gong-shui-san-xie-yi-ti-san-jie-pai-xu-y-8uah/) | 中等 | 🤩🤩🤩🤩 | |
| 6 | +| [235. 二叉搜索树的最近公共祖先](https://leetcode.cn/problems/lowest-common-ancestor-of-a-binary-search-tree/) | [LeetCode 题解链接](https://leetcode.cn/problems/lowest-common-ancestor-of-a-binary-search-tree/solutions/2402117/gong-shui-san-xie-yun-yong-dfs-qiu-jie-l-n3jh/) | 中等 | 🤩🤩🤩🤩 | |
| 7 | +| [236. 二叉树的最近公共祖先](https://leetcode.cn/problems/lowest-common-ancestor-of-a-binary-tree/) | [LeetCode 题解链接](https://leetcode.cn/problems/lowest-common-ancestor-of-a-binary-tree/solutions/2402113/gong-shui-san-xie-yun-yong-dfs-qiu-jie-l-htd9/) | 中等 | 🤩🤩🤩🤩 | |
6 | 8 | | [240. 搜索二维矩阵 II](https://leetcode-cn.com/problems/search-a-2d-matrix-ii/) | [LeetCode 题解链接](https://leetcode-cn.com/problems/search-a-2d-matrix-ii/solution/gong-shui-san-xie-yi-ti-shuang-jie-er-fe-y1ns/) | 中等 | 🤩🤩🤩🤩🤩 | |
7 | 9 | | [297. 二叉树的序列化与反序列化](https://leetcode-cn.com/problems/serialize-and-deserialize-binary-tree/) | [LeetCode 题解链接](https://leetcode-cn.com/problems/xu-lie-hua-er-cha-shu-lcof/solution/gong-shui-san-xie-er-cha-shu-de-xu-lie-h-n89a/) | 困难 | 🤩🤩🤩🤩🤩 | |
8 | 10 | | [437. 路径总和 III](https://leetcode-cn.com/problems/path-sum-iii/) | [LeetCode 题解链接](https://leetcode-cn.com/problems/path-sum-iii/solution/gong-shui-san-xie-yi-ti-shuang-jie-dfs-q-usa7/) | 中等 | 🤩🤩🤩🤩 | |
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