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## [96. Unique Binary Search Trees](https://leetcode.com/problems/unique-binary-search-trees/)
给定一个整数 `n`,求以 `1 ... n` 为节点组成的二叉搜索树有多少种?
#### Example
```text
Input: 3
Output: 5
Explanation:…
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## [98. Validate Binary Search Tree](https://leetcode.com/problems/validate-binary-search-tree/)
给定一个二叉树,判断其是否是一个有效的二叉搜索树。
假设一个二叉搜索树具有如下特征:
- 节点的左子树只包含小于当前节点的数。
- 节点的右子树只包含大于当前节点的数。
- 所有左子树…
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![image](https://user-images.githubusercontent.com/32625059/66559805-a0f4fb00-eb88-11e9-9002-ed4f284977b9.png)
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![image](https://user-images.githubusercontent.com/32625059/66127030-6554b100-e61d-11e9-965b-46869726ba24.png)
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![image](https://user-images.githubusercontent.com/32625059/66123141-edce5400-e613-11e9-8cea-b5772ca4b8b2.png)
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### Did you check existing issues?
- [ ] I have read all the [tree-sitter docs](https://tree-sitter.github.io/tree-sitter/using-parsers) if it relates to using the parser
- [X] I have searched the ex…
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## 🚀 Feature Request
### Is your feature request related to a problem? Please describe.
The repository lacks an implementation of Breadth First Search (BFS), which is essential for many graph-rela…
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Java class for Binary search tree implementation
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When search filtering is in effect in Clippings Manager or Clippings Sidebar and there are zero search results, it is still possible to display the normal context menu on the "No items found" item in …