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\subsection{Dynamic programming}  \begin{verbatim}  function maxReturn(i, x) begin  initialise mem to -1  return mr(i, x)  end  function mr(i, x) begin  if i = 0 then  return 0  end  if (mem[i][x] < 0) then  let m = 0  for a in [0, x] loop  let m = max(m, g(i, a) + mr(i - 1, x - a))  end  let mem[i][x] = m  end  return mem[i][x]  end  \end{verbatim}