**​评估指标：**

​准确率（Accuracy）​​ 
​- 适用性​：辅助指标，适用于类别分布相对均衡的子任务（如中性情感占比高）。
​- 限制​：若数据严重不平衡（如负面样本仅占5%），需与F1结合使用。
​
---

Submissions are evaluated on [area under the ROC curve](http://en.wikipedia.org/wiki/Receiver_operating_characteristic) between the predicted probability and the observed target.


## Submission File
For each ID in the test set, you must predict a probability for the TARGET variable. The file should contain a header and have the following format:

    ID,Label
    2,0
    5,0
    6,0
    etc.