AUTUMN 2026 // WEEK 09

A Receipt in Runs

The office printer damaged a receipt containing a three-digit collection number. Recover the display. The optional grid below is scratch space.

Closes November 09, 2026 at 00:00 UTC

Printer spool // one missing scan

INITECH / PRINTER SERVICE
Attach the current TPS cover sheet.
Return red stapler to Milton.

DISPLAY: 11 columns, 5 rows, top to bottom.
Head travels -> on odd rows, <- on even rows.
Runs alternate blank/ink, starting blank.
Zero-length runs are allowed.

scan row   runs in head-travel order
1          0,3,1,3,1,3
2          0,1,3,1,1,1,1,1,2
3          [unreadable]
4          1,1,2,1,1,1,1,1,2
5          0,3,1,3,2,1,1

Column service strip, LEFT to RIGHT:
11101010100
A 1 means an odd number of ink pixels
in that display column across all 5 rows.
A 0 means an even number.

Scratch grid

Toggle cells to sketch the receipt. This grid does not check your answer.