Describe your issue
The problem BSTITERATOR in the course “Trees and Binary Trees” (BSTREESPRO) has a broken judge. The official solution provided on the problem page itself** fails on the hidden test case in all languages** (Python, C++, C). The sample output matches correctly but the hidden test case fails every time. Since even your own editorial solution fails, this is clearly a judge/test case bug and not a user error. Please fix the hidden test case or the judge.
Problem link: Binary Search Tree Iterator in Trees and Binary trees
