I have two objective functions as follows.

{\min}\underset{f_{c,u}}{\max}\hspace{1mm}({\bf d-s},0)

and

{\min}\underset{f_{c,u}}{\max}\hspace{1mm}({\bf d-s})

Here, f_{c,u} are optimization variables where, c=1,2,\cdots,C and u=1,2,\cdots,U

\bf d is a known vector of size 1\times U

Is there a way to make them compatible with CVX?