Add hidden test cases, which are not shown to the user. Maybe show it after the user solves the question. Also add an ability to monkey patch build-in functions (through hidden tests?) which can be used to solve the given question.
Add hidden test cases, which are not shown to the user. Maybe show it after the user solves the question.
Also add an ability to monkey patch build-in functions (through hidden tests?) which can be used to solve the given question.