I've got a BPP problem plus a constraint in the type of items. Using the bpp.mod example by Andrew Makhorin I have to add a type for every item (A,B,C...), so I can think of a param t, of course accordingly changing w, so that the same type has the same weight.
data; param m := 6; param w := 1 50, 2 60, 3 30, 4 40, 5 40, 6 40; --> param t := 1 A, 2 B , 3 B, 4 C, 5 C, 6 C; param c := 100; end; I have to add a constraint so that the number of types for every bin is limited to maximum 2. Each bin can contain a number of the same type of items (i.e. A) or max 2 different types (i.e. A and C). it is not regarding the number of items, of course, I can have multiple items. It is kind of a cardinality of distinct items. Of course each bin must also keep respecting the weight constraint. How could I get this result? I really appreciate everyone who could help me. Leonardo Corato
