Premium LeetCode practice environment with modern Python tooling, beautiful tree visualizations, and comprehensive testing.

• Template-driven development - Consistent structure for every problem
• Beautiful tree visualizations - Pretty-printed binary trees with anytree
• Rich test logging - @logged_test decorator with detailed tracebacks
• One-command testing - make test-question QUESTION=problem_name
• Code quality - black, isort, ruff, mypy integration
• Modern Python - PEP 585/604 syntax with full type hints

# Run existing problems
make q-test QUESTION=two_sum
make q-test QUESTION=invert_binary_tree

# Run all tests
make test

Adding new problems: Use an LLM agent (rules in .amazonq/rules/development-rules.md) to automatically create new problems from copied LeetCode problem text using the template structure.

make q-test QUESTION=two_sum  # Test specific problem
make test                     # Run all tests
make lint                     # Code quality checks
make q-gen QUESTION=new_prob  # Generate new problem

# TreeNode visualization
4
├── 2
│   ├── 1
│   └── 3
└── 7
    ├── 6
    └── 9

# Test logging
2024-01-01 10:00:00 | SUCCESS | Got result: [4,7,2,9,6,3,1]
2024-01-01 10:00:00 | DEBUG   | Test passed! ✨

Perfect for interview preparation with professional-grade tooling and beautiful visualizations.