Basic steps	Storage	MACs
Input: $X\in {\mathbb{R}}^{d\times n}$	$d\times n$	-
$A\leftarrow \mathrm{reshape}(X,(d,n,1\left)\right)$	-	-
$B\leftarrow \mathrm{reshape}(X,(d,1,n\left)\right)$	-	-
$C\leftarrow A-B\in {\mathbb{R}}^{d\times n\times n}$	$d\times n\times n$	$d\times n\times n$
$D\leftarrow 1_d^{T}C$	$n\times n\times n$	$d\times n\times n$
Total	$n^2(d+1)+nd$	$2d{n}^2$