Python does not test this case at all

Yeah, it should be, so that would be better fitting to its name.

Made a fix with adding such details to description, seems like to be explained enough.

Well, it says each element has its own negative so I don't think you could use that 1 for all those -1, each one should have its own. I'd say your function should return false with that input.

Either way, if the behaviour is not clear from the instructions and examples, it should be properly explained. The reference solution in javascript compares the amount btw.

true, since the original description has no mentions about the same amount, actually

It's a lose condition anyways, so you might as well bail out early.