param m := 4;
param n := 6; 
param A: 1 2 3 4 5 6 :=
1	     1 1 1 1 1 1
2        1 0 1 0 1 0
3        1 0 0 1 0 0
4        1 0 0 0 0 0;
param: scadenza rendimento :=
1	1	0.018
2	2	0.035
3	3	0.058
4	6	0.11;
param pagamento :=
2	0
3	250
4	0
5	250
6	0
7	300;