LINGO程序哪里出错了model:sets:city/1..6/:u;link(city,city):d,x;endsetsdata:d=0 70 50 40 50 3070 0 30 40 60 5050 30 0 50 70 80 40 40 50 0 60 60 50 60 70 50 0 4030 50 80 60 40 0;enddataN=@size(city);min=@sum(link:d*x);@for(city(j):@sum(city(i)|i
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