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⚙️ Submission & Judge Engine

The submission service (src/services/submission.rs) manages non-blocking async execution against LeetCode's judging servers.

🔄 Judge Lifecycle Diagram​

stateDiagram-v2
    [*] --> Submitting: POST interpret_solution or submit
    Submitting --> Polling: Receive interpret_id / submission_id
    Polling --> Pending: GET check/ (returns PENDING / STARTED)
    Pending --> Polling: Sleep 500ms
    Polling --> Success: GET check/ (returns SUCCESS)
    Success --> [*]: Render Results / Percentiles / Error Logs

📊 Result Status Mapping​

The submission engine handles all judge response states:

  • Accepted: Renders green victory stats, runtime percentile, memory percentile, and total passed test cases.
  • Wrong Answer: Displays expected output vs actual code output, input test case, and failing test index.
  • Compile Error: Colorizes and prints compiler output log.
  • Runtime Error: Prints error exception message and stack trace.
  • Time Limit Exceeded: Alerts when algorithm complexity exceeds time bounds.