# Trim a Binary Search Tree

{% embed url="<https://www.lintcode.com/problem/701/>" %}

{% embed url="<https://leetcode.com/problems/trim-a-binary-search-tree/>" %}

## Solution 1 (Java)

```java
/**
 * Definition of TreeNode:
 * public class TreeNode {
 *     public int val;
 *     public TreeNode left, right;
 *     public TreeNode(int val) {
 *         this.val = val;
 *         this.left = this.right = null;
 *     }
 * }
 */

public class Solution {
    /**
     * @param root: given BST
     * @param minimum: the lower limit
     * @param maximum: the upper limit
     * @return: the root of the new tree 
     */
    public TreeNode trimBST(TreeNode root, int minimum, int maximum) {
        if (root == null)
            return null;

        if (root.val < minimum)
            return trimBST(root.right, minimum, maximum);
        if (root.val > maximum)
            return trimBST(root.left, minimum, maximum);

        root.left = trimBST(root.left, minimum, maximum);
        root.right = trimBST(root.right, minimum, maximum);
        return root;
    }
}
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://blog.yushunchen.com/algo/binary-tree/3.-binary-search-tree/trim-a-binary-search-tree.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.