有加分的(10分)
model:
sets:
liaochang/1,2/:x,y,e;
gongdi/1..6/:a,b,d;
links(liaochang,gongdi):c;
endsets
min= @sum(links:c(i,j)*((x(i)-a(j))^2+(y(i)-b(j))^2);
@for(gongdi(j):
@sum(liaochang(i):c(i,j))=d(j));
@for(liaochang(i):
@sum(gongdi(j):c(i,j))<e(i));
@for(liaochang(i):
@free(x);@free(y));
data:
a=1.25 8.75 0.5 5.75 3 7.25;
b=1.25 0.75 4.75 5 6.5 7.75;
d=3 5 4 7 6 11;
e=20 20;
enddata
end