It's a serious blog.

This morning, I'm working on GYM104064. When I submited my solution, the verdict is WA on test 16. I had no idea if there's anything wrong in my code, so I checked the status detail.

On the test 16, the result shown as follow:

The checker comments: "output contains a duplicate Roman numeral". But as you can see, it is the Jury's answer that contains a duplicate Roman numeral. That's not my fault.

As there's some Accepted submission before, I rejudged some of them.

Every submission that had passed before failed on the test 16, same reason. I doubt someone abused the coach mode rights to modify the package of the problem I. I wondered how to redo his operation and fix the problem.

The purpose of the blog is not only ask for help, but also want to draw the community's attention on abusing the coach mode.

Thank you for reading.