> I am trying to count shift calendar problem, in the attachment you can see my > model > > after some seconds i got optimal solution and trying to find integer > solution, but after hours i have only this kind of output: > +6434641: mip = 1.920000000e+02 >= 1.900000000e+02 1.0% (125068; 112713) > ^^^rising ^^^ not going down anymore > > is it ok? do i have some problem in model?
This means that your model is hard for glpk b&b solver. If a suboptimal solution (i.e. 192) is sufficient for you, you can limit the solution time with the command-line option `--tmlim nnn'; note that the exact optimum is either 190 or 191 or 192. Also you can try using the options `--intopt' or `--cuts'; sometimes this helps. _______________________________________________ Help-glpk mailing list [email protected] http://lists.gnu.org/mailman/listinfo/help-glpk
