bin(s));
sqrt((x(i)-a(1))^2+(y(i)-b(1))^2));!目标函数;
sum(supply(j):c(i,j))=d(i));
sum(demand(i):c(i,j))<=e(j));
sum(supply(j):c(i,j))=d(i));
sum(demand(i):c(i,j))<=e(j));
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