Count Unique Binary Search Trees - The Coding Shala
In this post, we will learn how to Count Unique Binary Search Trees and will implement its solution in Java.
Count Unique Binary Search Trees Problem
Count Unique Binary Search Trees Java Program
Using Dynamic Programming.
One way to solve this problem is we can generate a list of all possible unique binary search trees and return the size of the list.
We can use dynamic programming to solve this problem. For every value of i here i is the root, then 1 to i-1 numbers will come in the left subtree and i+1 to n numbers come in the right subtree so the answer will be a total of (i-1)*(n-i).
Time complexity: O(n^2).
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