2011年B题的第三问可以用lingo解出来吗？
哪个大神试过用lingo解一下这篇论文里面的模型？跪求指导！！！我用lingo写，第一个模型就解不出来了。。。
model:
sets:
pingtai/ 1..92 /;
jiedian/ 1 .. 92 /:v,y;
assign(jiedian,pingtai):c,x;
endsets
data:
v=
c=(数据较多，我就不贴了。。。)
enddata
min=@sum(pingtai(j)|j#le#20:@sum(assign(i,j)|i#ge#21:v(i)*c(i,j)*x(i,j)));
@for(jiedian(i)|i#ge#21:@sum(pingtai(j)|j#le#20:x(i,j))=1);
@for(jiedian(j)|j#le#20:@sum(assign(i,j):v(i)*x(i,j))<=8.5);
@for(jiedian(i)|i#ge#21:@for(pingtai(j)|j#le#20:c(i,j)*x(i,j)<=30));
@for (assign: @bin(x));
end
上面那怪符号都换成@。。。
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