The hope is that the remaining elements in the list l are similar in the sense that max(l)/min(l) is small, the heuristic could be improved one you try to make

The hope is that the remaining elements in the list l are similar in the sense that max(l)/min(l) is small, the heuristic could be improved one you try to make a trade off between max(l)/min(l) in the list and the difference between sum A and sum B.