运筹学的一个问题的lingo模型求解答

model:
sets:
person/1..6/:a;
day/1..5/;
arrange(person,day):y,x,c;
endsets
data:
a=10 10 9.9 9.8 10 11.3;
c=
6 0 6 0 7
0 6 0 6 0
4 8 3 0 5
5 5 6 0 4
3 0 4 8 0
0 6 0 6 3;
enddata
min=@sum(arrange(i,j):a(i)*x(i,j));
@for(arrange:y=@if(x#ge#2,1,0);x=2*y);
@for(person(i)|i#le#4:@sum(day(j):x(i,j))>=8);
@for(person(i)|i#ge#5:@sum(day(j):x(i,j))>=7);
@for(day(j):@sum(person(i):y(i,j))=1);
@for(day(j):@sum(person(i):x(i,j))=14);
end