Added DP Solution for Optimal BST Problem (#1740)
Added DP Solution for Optimal BST Problem (#1740)

* Added code to dynamic_programming directory

* Added doctest

* Elaborated BST

* Small tweaks

* Update optimal_bst.py

* Some touchups

* Fixed doctest

* Update optimal_bst.py

* Update optimal_bst.py

* Update optimal_bst.py

* Rename optimal_bst.py to optimal_binary_search_tree.py

Co-authored-by: Christian Clauss <585dd401264c1e46d17ebec1862e5d2a9b6a6c5d@me.com>

TheAlgorithms/Python