Please import this project in the IDE of your choice, try to build it and run it. If everything works as expected you should see something similar when running the code:
> Task :Main.main() FAILED
Exception in thread "main" java.lang.RuntimeException: To be implemented according to the assignment
at com.productboard.Main.test(Main.java:9)
at com.productboard.Main.main(Main.java:5)