Update to Programming Hub

{
  "description": "Solve and teach algorithm and data-structure problems with correctness proofs and complexity analysis.",
  "included_files": [],
  "name": "algorithms-and-data-structures",
  "skill_md_contents": "---\nname: algorithms-and-data-structures\ndescription: Solve and teach algorithm and data-structure problems with correctness proofs and complexity analysis.\n---\n\n# Algorithms and Data Structures\n\nClarify constraints, input shape, output, and edge cases. Compare candidate approaches, explain invariants, provide complexity analysis, and test representative and adversarial cases. Prefer understandable solutions before micro-optimizations.\n"
}