Question

如何用lingo定义下列变量

x11,x12,x21,x22,x31,x32,x41,x42,x51,x52,x61,x62=>0; x11,x21,x31,x41,x51,x61<=3; 且这12个数均为整数

Answer 1

x11<=3;
@gin(x11);

第一个是限制不大于3 第二个是整数 照这样写就行了 非负是默认的 不用写

Answer 2

model:
sets:
number1/1..6/:;
number2/1,2/:;
link(number1,number2):x;
endsets
@for(link:x>=0);
@for(link(i,j):x(i,1)<=3);
@for(link:@gin(x));
end