{
  "domain": "computer-science",
  "topics": [
    "coding-theory",
    "combinatorics"
  ],
  "type": "construction",
  "also": [
    "proof"
  ],
  "cover": {
    "motif": "spheres"
  },
  "source": {
    "key": "horizonmath",
    "name": "HorizonMath",
    "url": "https://github.com/ewang26/HorizonMath/blob/4ef0b61a8a6d4c5ded661fab7c2e896af84abe6e/data/problems_full.json#L1088-L1097",
    "id": "A21_10_binary_code",
    "curator": "Erik Y. Wang, Sumeet R. Motwani et al.",
    "status": "open",
    "as_of": "2026-10-20",
    "catalog": "0521c19bbd38"
  }
}