Originally posted by: Lessi

Hi CPers,

I am familiar with writing MIP models using Concert technology. However, I am totally new with the constraint programming. I want to write the following model using CP.

The model is attached below since it displays "spam" when I try to attach it here.

I am not sure how to write the code for constraints (3) and (7). Which part of the manual I should read to do that? This is how I code at the moment.

    IloEnv envCP;
    int nbPOIs = candidatePOIs.size();
    try {
        IloModel modelCP(envCP);

        IloIntVarArray pSlaveCP(envCP, nbPOIs, 0, nbPOIs-1); //constraint (6).
        
        modelCP.add(IloAllDiff(envCP, pSlaveCP, "alldifference")); //this is constraint (2)
        modelCP.add(pSlaveCP[0] == 0); //constraint (4)
        modelCP.add(pSlaveCP[nbPOIs - 1] == nbPOIs - 1); //constraint (5) 

        I am not sure how to write the code for constraints (3) and (7)

        }
        
         
    }
    catch (IloException& ex) {
        env.out() << "Error: " << ex << std::endl;
    }
    env.end();

Thanks,

/Lessi

Originally posted by: Lessi

This is the model 

Hi,

could https://www.ibm.com/developerworks/community/forums/html/topic?id=66894a3f-f47a-439a-8b35-db4e9c3812b2

help ?

regards

Originally posted by: Lessi

Thank you for your inputs.

I know those models are equivalent. However, I would like to know if it is possible to write 2*|V| constraints (3) and (7) using CP code instead of writing O(|V|^2) time order constraint as in MIP formulation.

Hi,

then have you had a look at https://www.ibm.com/developerworks/community/forums/html/topic?id=f58daf79-f752-48e4-8f25-54b2f6f71b40&ps=25

?

regards