Seems like a silly problem for day 7 of 7 day prep course.

Evaluated as "Advanced"... Solved in 5 min. But some previous tasks evaluated as Basic or Intermediate took aroud 1 day. lol

Is the typescript code supposed to have everything except the preOrder function predefined, like the starter code for other languages?

Currently it requires you to define the BinaryTree data type and convert the input string to a Binary Tree.

Why is this problem "Advanced"? Literally solved in 2 minutes.

my C++ Solution

 void preOrder(Node *root) {
        if(root)
        {cout<<root->data<<" ";
        preOrder(root->left);
        preOrder(root->right);
        }
    }