This feature allows on-site contestants (e.g. ICPC) to submit source code directly from contest terminals. Authentication is handled by an IP-based authentication backend.

API Contract

Submit Solution

POST /problem/{problem_code}/api_submit

Description

Creates a new submission for the specified problem.

Authentication

IP-based authentication (handled by a dedicated authentication backend).

Request

• Content-Type: multipart/form-data
• Path Parameters
  • problem_code: unique code of the problem
• Form Fields
  • language (string): ID of the submission language
• Files
  • submission_file (file): source code file

Responses

✅ 201 Created
Submission successfully created.

{
  "id": 12345
}

❌ 400 Bad Request
Validation failed.

{
  "errors": {
    "language": "Unsupported language",
    "submission_file": "File is required"
  }
}

❌ 403 Forbidden
Request rejected by the authentication backend.

Notes

• Each request creates a new submission.
• The judging process is asynchronous.
• File size and language constraints are enforced by the server.