Question

lingo的0-1矩阵，怎样限定行和为1

怎样限定矩阵的每一行的和都为1，但对列不作约束。

model:
sets:
users/u1..u137/:u;
roads/r1..r503/:r;
link(users,roads):x;
endsets
@for(users(I):@for(roads(J):@bin(x(I,J))));

Answer 1

@for(users:@sum(x) = 1);