Submissions are evaluated using [ROC AUC](https://scikit-learn.org/stable/modules/generated/sklearn.metrics.roc_auc_score.html) between the predicted value and the observed target.


## Submission File
For each `id` in the test set, you must predict the probability of the binary target `y`. The file should contain a header and have the following format:

    id,y
    750000,0.5
    750001,0.5
    750002,0.5
    etc.