It's true, you're right. I was trying and I got confused. It was my mistake, I was not handling the input array correctly if the array was empty. Thanks.

Your own print statement is adding the extra - sign when you're printing to the console, that's why you're seeing double negatives.

Your code also is not failing on that input, it's failing on a different one. One last thing, the input that you've listed looks like two inputs put together.