Quiet Week-end Challenge (49G?) - Closed

[Gerald H]

Unlike New Scientist

https://enigmaticcode.wordpress.com/2011...es-harder/

I will not allow this puzzle to drag on for 31 years.

Here an HP 38G programme to produce the desired even & odd lists:

Store a list of four integers (pos, neg or zero, repetitions allowed) in L1 & actuate the programme, returning the two lists in L2 & L3.

O4SQE4SQ

4*L1+1►L2:
L1(2) ►B:
L1(3) ►C:
L1(4) ►D:
2*(L1(1)+{B+C+D+1,D-B-C,C-B-D,B-C-D})►L3:

Honorable mentions for Gerson, nlj & Gilles.