Update a challenge

Be careful about choosing the change. It has consequences!

• major change: the new challenge version is completely incompatible with the previous versions, \ and as a consequence all the submissions done for the previous versions will be demoted (even if their score is numerically higher);
• minor change: the score obtained for the new version will be roughly comparable with the scores you got \ for the previous version, but there is no guarantee that the existing submissions could be re-evaluated \ (e.g. because the number of items changed);
• patch change: the score obtained for the new version will be comparable with the scores you got \ for the previous version and it is guaranteed that the existing submissions could be re-evaluated \ (you will actually see the button \ for such submissions), i.e:
  • the number of items in all tests has not changed,
  • changes to the input and expected files are possible, but are not significant (but note that some changes might break re-evaluation for some metrics)
  • in particular, changing README.md and adding extra evaluation metrics could usually be done as a patch change.
    ^{formWidget} _{MsgUpdate}