FA-95230 / Warehouse slotting and bin packing / Member archive

Pick sequence: serpentine parity inverted · case 05

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

Member previewVariant 5 · 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
whitespace	`[["01-02-1", "01-01-1"], []]`	`[["01-01-1", "01-02-1"], []]`	Failed

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