Logic behind MaxUnpoolWithArgmax

[pedrogalher]

I have been reading thorugh the code for the function "MaxUnpoolWithArgmax" since I'm interested in the logic to extract the indexes [b,y,x,c] from the argmax tensor. I cannot understand the maths behind to extract the index "y" and "x". Could you elaborate a bit on how did you get these expressions? :

• y = argmax // (output_shape[2] * output_shape[3])

• x = argmax % (output_shape[2] * output_shape[3]) // output_shape[3]

Thank you so much
Pedro