Leetcode Study Plan

LeetCode Study Plan

Use this skill when the user provides a LeetCode problem and solution to be stored and summarized.

Workflow

1. Analyze Input: Extract problem number, name, difficulty (Easy, Medium, Hard), description, constraints, examples, and the code.
2. Categorize: Identify the problem type (e.g., Arrays, Graphs, DP, etc.).
3. Validate Big-O: Critically analyze the provided solution's time and space complexity. If the user's provided Big-O notation is incorrect or suboptimal, identify the true complexity and use the correct one in the final output.
4. Generate Summary:
   • Title: Format as [Problem Number]. [Problem Name] [[DIFFICULTY]].
   • What the problem is asking
   • Constraints of the problem
   • Examples
   • Essence: Summarize the problem's core in as few words as possible. Avoid paragraphs; make it scan-friendly.
   • High-level Summary: Use bullet points for the main solution and 1-2 alternative approaches. Include verified Big-O time and space complexities for each.
   • Actual Code: Include the provided solution first, then provide clean, idiomatic code for the alternative approaches discussed in the summary.
5. Save: Write the output to /Users/<login>/study/leetcode-guide/<problem-type>/<number>.<name>.md.
   • The file name should be <number>.<camelCaseName>.md (e.g., 121.bestTimeToBuyAndSellStock.md).

Coding Standards

• Idiomatic Python: Use list comprehensions, map, zip, enumerate, and proper slicing where appropriate.
• Type Hinting: Include type hints for function parameters and return types (e.g., List[int], Optional[int]).
• Readability: Use descriptive variable names and ensure logical flow. Use Solution class structure common to LeetCode.

Output Format Template

[Number]. [Problem Name] [[DIFFICULTY]]

What the problem is asking

[Brief description]

Constraints

[Constraints]

Examples

[Examples]

Essence

[Extremely brief summary of the core objective]

Solutions & Complexity

• Primary Approach: [Name]
  • [Brief bullet point description]
  • Time: O(N)
  • Space: O(1)
• Alternative Approach: [Name]
  • [Brief bullet point description]
  • Time: O(N log N)
  • Space: O(N)

Code

Provided Solution

[Actual Code]

Alternative: [Approach Name]

[Idiomatic Alternative Code]