I agree. It's hard to fix bugs for test cases you can't read.

Just had a look at the random tests, they are fine. Care to share your code? Mark it as having spoiler content, though. You can also ask here.

You're aware that there are two kinds of tests? Those you can see, and those that are hidden. Note that I didn't write the Java version, so I'm not sure what's going on there. That being said, do you manipulate the array?

I'm not a Java developer myself (someone else must've done the translation). But I'm guessing the message is highlighting the incorrect parts.

So the "a" with swuare brackets around it should be a "1" instead. Hope that helps?