For this competition, we will use multi-class classification accuracy:
\[\large\frac{1}{n}\sum_i^n{\hat{y_i} == y_i}\]
Where:

 - y hat is the ground truth label and y is the predicted label.
 - n is the number of images in the test set. 
 - The double equals sign represents a boolean function which returns 1 if the predicted label is equal to the actual label and 0 otherwise.