Solve hanging lantern problem: Difference between revisions

==={{header|J}}===

Translation of [[#APL|APL]]:

<lang J>lanterns=: {{ (!+/y) % */!y }}<</lang>

Example use:

<lang J> lanterns 1 2 3

60

lanterns 1 3 3

140

</lang>

Also, a pedantic version where we must manually count how many values we are providing the computer:

<lang J>pedantic=: {{

assert. ({. = #@}.) y

lanterns }.y

}}</lang>

And, in the spirit of providing unnecessary but perhaps pleasant (for some) overhead, we'll throw in an unnecessary comma between this count and the relevant values:

<lang J> pedantic 3, 1 2 3

60

pedantic 3, 1 3 3

140</lang>