The evaluation metric for this competition is [area under the ROC curve ](https://en.wikipedia.org/wiki/Receiver_operating_characteristic) between the predicted probability and the observed target.

## Submission Format
For each `txid` in the test set, you must predict the probability if it is a fraudulent transaction or not. The file should contain a header and have the following format:

```
txid, is_fraud
0, 0.5
1, 0.5
```