Appendix: Problem format specification

DOMjudge supports the import and export of problems in a zip-bundle format.

The base of the format is the ICPC problem package specification.

On top, DOMjudge defines a few extensions:
  • domjudge-problem.ini (optional): metadata file, see below.

  • problem.{pdf,html,txt} (optional): problem statements as distributed to participants. The file extension determines any of three supported formats. If multiple files matching this pattern are available, any one of those will be used.

  • Annotation with @EXPECTED_RESULTS@: for jury solutions. Use this to annotate the possible outcomes that a submission can have, that will be accepted by the Judging verifier. This extension is in consideration to be added to the ICPC specification, see Note that, to match with the current ICPC specification, the @EXPECTED_RESULTS@: tag is ignored in the four official submission subdirectories, but it will work if the tagged solution is in, e.g., submissions/mixed-verdicts, submissions/mixed/ or submissions/rejected/.

    Example jury solution with multiple outcomes (Shortened)
    Sample solution in Python for the "boolfind" interactive problem.
    This will sometimes give an off by one answer. This is a demonstration
    of how to use the @EXPECTED_RESULTS@ tag.
    import sys, random

The file domjudge-problem.ini contains key-value pairs, one pair per line, of the form key = value. The = can optionally be surrounded by whitespace and the value may be quoted, which allows it to contain newlines. The following keys are supported (these correspond directly to the problem settings in the jury web interface):

  • name - the problem displayed name

  • allow_submit - whether to allow submissions to this problem, disabling this also makes the problem invisible to teams and public

  • allow_judge - whether to allow judging of this problem

  • timelimit - time limit in seconds per test case

  • special_run - executable id of a special run script

  • special_compare - executable id of a special compare script

  • points - number of points for this problem (defaults to 1)

  • color - CSS color specification for this problem

The basename of the ZIP-file will be used as the problem short name (e.g. “A”). All keys are optional. If they are present, the respective value will be overwritten; if not present, then the value will not be changed or a default chosen when creating a new problem. Test data files are added to set of test cases already present. Thus, one can easily add test cases to a configured problem by uploading a zip file that contains only testcase files. Any jury solutions present will be automatically submitted when allow_submit is 1 and there’s a team associated with the uploading user.