Maximize 
+ 0 x1 - 2 x2 - 4 x3 - 6 x4 - 8 x5 - 10 x6 - 12 x7 - 14 x8 

Subject To 
x1 - x2 >= 0 
x1 - x3 >= 0 
x2 - x4 >= 0 
x3 - x4 >= 0 
x2 - x5 >= 0 
x3 - x5 >= 0 
x2 - x6 >= 0 
x3 - x7 >= 0 
x1 - x8 >= 0 
x4 - x8 >= 0 

Bounds 
0 <= x1 <= 1 
0 <= x2 <= 1 
0 <= x3 <= 1 
0 <= x4 <= 1 
0 <= x5 <= 1 
0 <= x6 <= 1 
0 <= x7 <= 1 
0 <= x8 <= 1 

end 
