I have just finished up computing the average cost of an OBST and I know I computed it correctly. My next task is to print the tree in preorder.

Optimal binary search tree dynamic programming Freelancers and Jobs - Freelancer

I have an attempt at this using recursion but can't seem to shake the null pointer error. Looks like you aren't checking your bounds correctly.

If there is no left or right child, you shouldn't be printing that side. By posting your answer, you agree to the privacy policy and terms of service.

Dynamic Programming | Set 24 (Optimal Binary Search Tree) - GeeksforGeeks

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