DSA Level 2 Data Structures Trees Construct Bst From Postorder Traversal

Construct Bst From Postorder Traversal

easy

1. You are given a partially written function to solve(Refer question video).
2. Task : Construct Binary Search Tree from given PostOrder Traversal.
3. you will be given an array representing a valid PostOrder of a Binary Search Tree. Program is required to create a unique Binary Search Tree.

Input Format

Input is managed for you.

Output Format

Output is managed for you.

Constraints

0 &lt;= Number of Nodes &lt;= 10^9
-10^9 &lt;= value of Node data &lt;= 10^9
Valid PostOrder traversal.

Notice

Try First, Check Solution later

1. You should first read the question and watch the question video.
2. Think of a solution approach, then try and submit the question on editor tab.
3. We strongly advise you to watch the solution video for prescribed approach.

Example

Input

6
1 2 6 7 5 3

Output

2 -> 3 <- 5
1 -> 2 <- .
. -> 1 <- .
. -> 5 <- 7
6 -> 7 <- .
. -> 6 <- .

Construct Bst From Preorder Traversal

Construct Bst From Levelorder Traversal

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