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@luffdev luffdev commented Dec 14, 2025

Summary

This PR delivers a comprehensive upgrade to the Backtracking portion of the codebase, combining full problem implementations, ontology-aligned metadata, tooling improvements, and stricter documentation/formatting conventions into a single, coherent update.


Key Changes

1. Documentation & Formatting Rules

  • Clarified and enforced no blank line rule between:
    • Solution comment blocks and their corresponding class / function
    • JUDGE_FUNC comment blocks and implementations
  • Updated SOLUTION_CONTRACT.md:
    • Added explicit rule in A.7.2 Solution Block Comments
    • Added arrow-based annotations in examples to visually highlight the rule
    • Marked “No blank line” as a required component in the format table
  • Updated A.7.3 JUDGE_FUNC section to follow the same convention
  • Updated Quick Reference templates accordingly for consistency

2. Complete Backtracking Problem Implementations

  • Added complete, contract-compliant implementations for 12 backtracking problems:
    • 0039, 0040, 0046, 0047, 0052, 0077, 0078, 0079,
      0090, 0093, 0131, 0216
  • All solutions strictly follow SOLUTION_CONTRACT.md (A.7.2) formatting
  • Added JUDGE_FUNC implementations to support generator-based testing
  • Created corresponding .in / .out test cases
  • Added generators for all problems following GENERATOR_CONTRACT.md

3. Ontology & Metadata Expansion

  • Added TOML metadata files for all 12 problems, fully aligned with ONTOLOGY_DESIGN.md
  • Coverage includes:
    • Combination Sum variants (39, 40, 216)
    • Permutations (46, 47)
    • Subsets (78, 90)
    • Combinations (77)
    • N-Queens II (52)
    • Word Search (79)
    • String segmentation problems (93, 131)
  • Metadata includes:
    • Pattern families and variants
    • Solution-level relationships
    • Ontology-consistent identifiers

4. Tooling Improvements

  • Added check_test_files.py utility to detect and fix double newline endings in test files
    • Supports:
      • --fix for automatic repair
      • --verbose for detailed output
  • Updated tools/README.md with full documentation for the new tool

Impact

  • Establishes strict, enforceable formatting standards for solution and judge blocks
  • Provides end-to-end backtracking coverage: implementation → tests → generators → metadata
  • Improves long-term maintainability through ontology alignment and automated tooling
  • Reduces subtle formatting-related errors in reviews and future contributions

Checklist

  • All solutions follow SOLUTION_CONTRACT.md
  • All generators follow GENERATOR_CONTRACT.md
  • Ontology metadata validated against ONTOLOGY_DESIGN.md
  • Tests added and verified
  • Documentation updated and consistent

- Add explicit "No blank line" rule in A.7.2 Solution Block Comments
- Add arrow annotations in examples showing no gap
- Add "No blank line" as required component in format table
- Update A.7.3 JUDGE_FUNC section with same convention
- Update Quick Reference template accordingly
- Fix solution comments to follow SOLUTION_CONTRACT.md A.7.2 format
- Add JUDGE_FUNC for generator support to all 12 backtracking problems
- Create test cases (.in/.out) for problems 0039, 0040, 0046, 0047,
  0052, 0077, 0078, 0079, 0090, 0093, 0131, 0216
- Add generators following GENERATOR_CONTRACT.md
- Update ontology with backtracking patterns and families
… in test files

- Create check_test_files.py with list and fix functionality
- Update tools/README.md with new tool documentation
- Support --fix flag for automatic repair
- Support --verbose flag for detailed output
- Add TOML metadata files for combination sum variants (39, 40, 216)
- Add TOML metadata files for permutation variants (46, 47)
- Add TOML metadata files for subset variants (78, 90)
- Add TOML metadata files for combinations (77)
- Add TOML metadata files for N-Queens II (52)
- Add TOML metadata files for word search (79)
- Add TOML metadata files for string segmentation problems (93, 131)
- All files follow ONTOLOGY_DESIGN.md specification
- Include solution-level metadata with relationships and variants
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@lufftw lufftw left a comment

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Reviewed and tested locally — everything works as expected. Approved.

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Reviewed and tested locally — everything works as expected. Approved.

@lufftw lufftw merged commit 837b1ef into main Dec 14, 2025
@lufftw lufftw deleted the feat/backtracking-exploration-docs-ontology-metadata branch December 14, 2025 11:11
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3 participants