the scaled mean pool layer of cryptonets

[palettis]

From the description of the cryptonets, we find the input of layer 3 is 5 * 13 * 13，and the output of the layer 3 is also 5 * 13 * 13. But the windows is 1 * 3 * 3, and ther is no padding and stride declaration. why the output of layer 3 is 5 * 13 * 13? why the output of pool layer won`t be smaller?

[pinglanliu]

Have you figured this out? I have the same confusion.