Solution (leetcode-in-java 1.23 API)

java.lang.Object
- g0001_0100.s0096_unique_binary_search_trees.Solution

```
public class Solution
extends Object
```
96 - Unique Binary Search Trees.
Medium

Given an integer n, return the number of structurally unique **BST’**s (binary search trees) which has exactly n nodes of unique values from 1 to n.

Example 1:

Input: n = 3

Output: 5

Example 2:

Input: n = 1

Output: 1

Constraints:
- 1 <= n <= 19

- Constructor Summary
  
  Constructors
  Constructor Description
  
  Solution()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  int numTrees(int n)
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- Solution
```
public Solution()
```

Method Detail
- numTrees
```
public int numTrees(int n)
```