[HenryBemis]

So....

1st line, all zeros. It shows me where the zeros are.

Well.. that's it. Any non-zero is a 1.

So.. finished on the second line.

Am I the only one?

[morcus]

Yeah, it's definitely meant to be a joke.

You also don't need to start with all zeros, any input will allow you to finish on the second try.

[IAmBroom]

That didn't get it?

No, sadly.