Hi Amr,
Codalab’s leaderboard required us to populate all fields when we report a score. Because we can’t have multiple leaderboards for one competition, that means that we have to provide a score for each subtask even if you’re only submitting to one. The most
straightforward way to handle this is to give a “non-score” (in our case, -1) for sub tasks you didn’t submit to. So if you are submitting to subtask 1, you should get a genuine score for subtask 1, and -1 for both subtask 2 and 3.
It’s unclear how Codalab determines the ranking list off to the side, but as long as the correct values are in the leaderboard matrix (where you see the breakdown of scores), you’re all set.
Best,