@Adám ah, was looking at the tacks up and down lines and noticed inconsistancies there, not to worry then...

Why is

6 6 4 2 1(+⍥(3∘↑))6 5 5

resulting in 12 11 9 and

6 6 4 2 1 (+⍥((≢⊢)∘↑)) 6 5 5

resulting in 8?

The right operand is applied to each argument separately. ⍥←{(⍵⍵ ⍺)⍺⍺(⍵⍵ ⍵)} not {(⍵ ⍵⍵ ⍺)⍺⍺(⍺ ⍵⍵ ⍵)}

@Adám Thank you! It took a few minutes to sink in, but I fully understand it now. It help me if I think of the times operator as doing a macro-like expansion of the functions on the left ⍵ times before applying the result to the argument ⍪1.

ah, yes, including the inner part :)

@Adám the 'your submissions' page is broken

In what way?

It doesn't show any

Did you submit? (Not just test.)

Oh, right

lol

It is a bit confusing, and we already have a plan to rework all that logic.

If it passes all tests, it should submit automatically imo

Nah, even better: If you're not logged in, you only have a Test button. When you (register and) log in, everything you've tested is auto-submitted. Once logged in, you only have a Submit button.

But that'll probably be for the next round. Anyway, we got a hug of death as soon as we launched, so we're going into maintenance mode until Monday, so we can properly fix the performance issue.