The evaluation metric for this competition is [RMSE-Score (Root-mean-squared-error)](https://en.wikipedia.org/wiki/Root-mean-square_deviation) . The RMSE score is a commonly used measure of the differences between of observed values and predicted values by an estimator or model. The RMSE score is given by: \[ RMSE = \sqrt{\frac{\sum_i (\hat{y}_i-y_i)^2}{N}} \] where i runs over samples in the test set and N is the number of samples. Submission Format For every structure in the dataset the submission file should contain a row with 2 columns. The first column is the structure id and the second column is the predicted heat of formation id,hform 1,0 2,0 3,0