* file name: ex1.ine
*   2 dimensional polyhedron with three vertices (0,3), (-1, 4) and (-1,10) and 
*   two extremal rays (2,1) and (1,2).
H-representation
begin
  4   3   integer
 12   2  -1
 -6  -1   2
 -3   1   1
  1   1   0 
end
