FA-95229 / Warehouse slotting and bin packing / Member archive

Pick sequence: serpentine parity inverted · case 04

Pickers enter odd aisles from the far end and double back through every aisle.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

codes "aisle-bay-level" with decimal parts and optional surrounding whitespace. Valid aisles 1-40, levels 1-6. Canonical form "AA-BB-L" (two-digit aisle and bay). Duplicates collapse. Sequence: aisles ascending; odd aisles walk bays ascending, even aisles descending; level ascending within a bay. Invalid codes are returned as given, sorted, duplicates kept. Return [sequence, invalid].

Why this case matters

Pick paths are sequenced from location codes in a serpentine walk.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
generated mix 64	`[["03-12-6", "03-07-6"], ["X\t41-1-2 "]]`	`[["03-07-6", "03-12-6"], ["X\t41-1-2 "]]`	Failed

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