I recently went through interviewing at a number of companies. One had a hackerrank problem to solve. I was fine with it, took me a couple of hours to complete.

I recently went through interviewing at a number of companies. One had a hackerrank problem to solve. I was fine with it, took me a couple of hours to complete. What frustrated me is that my solution passed all of the disclosed scenarios, but failed about half of the non disclosed. Neither the input nor output was disclosed. How do you expect someone to solve a problem when you dont disclose either the inputs or the expected output?