Amazing

It doesn't exist at all, because it does not make any sense

There's many nonsense things which exist tho.

I do not want to discuss usefulness of negative 0 or lack thereof, but there are some context where -0 exists, and is distinguishable from 0. IEEE-754 representation of floating point numbers is one of such situations.

-0 exists, sometimes.

Maybe because it's a number and not a string? And the compiler has some autofix for zero?

Or I don't understand your question.

-0 doesn't really exist. It's still 0.

Rust version has no random tests.

Fixed

Rust translation has no random tests.

Initial code is missing package reducebutgrow. I've added it to the initial code.

Meanwhile you can add it to your solution yourself.

I think there's an issue with the Kotlin version of this kata. Even when I implement the function in the most simple (not correct) way possible:

fun grow(arr: IntArray): Int = 6

I get this error from tests:

fixture.kt:10:25: error: unresolved reference: grow
        assertEquals(6, grow(intArrayOf(1, 2, 3)))

I can't submit the kata because of this, so this really should be resolved.

Great kata. Published C# translation (I'm quite new to the site so I hope I did it correctly).