Not getting the desired output

#1

In my submission, I have not considered the number of testcases and the key. I just wanted to execute the first part i.e. printing the preOrder of the given BST but I am not getting the correct preOrder output. Please check my code and suggest me what corrections should be made.

#2

Is anyone assigned to solve my doubt?

#3

Hey @Syed-Siddiqui-2497215583854102
perorder code is fine
just a change
nn.left = construct(arr, lo, mid - 1); // instead of nn.left = construct(arr, 0, mid - 1);
In this Question, Don’t use Inorder travelers for tree Build (because in some case root node is change)
just Add Node manually