Algorithm 2 AMA
Initialize λ0.
1:	for m = 1, 2, 3, … do
2:	for i = 1, …, n do
3:	${\mathrm{\Delta }}_i^m={\displaystyle {\sum }_{l_1=i}{\mathbf{\lambda }}_l^{m-1}}-{\displaystyle {\sum }_{l_2=i}{\mathbf{\lambda }}_l^{m-1}}$
4:	end for
5:	for all l do
6:	${\mathbf{g}}_l^m={\mathbf{x}}_{l_1}-{\mathbf{x}}_{l_2}+{\mathrm{\Delta }}_{l_1}^m-{\mathrm{\Delta }}_{l_2}^m$
7:	${\mathbf{\lambda }}_l^m={\mathcal{P}}_{C_l}\left({\mathbf{\lambda }}_l^{m-1}-\nu {\mathbf{g}}_l^m\right)$
8:	end for
9:	end for