From:	Markus Zijlstra (student) <2400899Z@student.gla.ac.uk>
Sent:	04 February 2020 23:22
To:	pat@dcs.gla.ac.uk
Subject:	Constraint Programming - MathChallenge.java fix

Hi,

While I was looking over the material from the lectures today, I think I found the issue that was 
making MathChallenge.java give the wrong result. This is line 51 to line 54:

      // cd = 10.c + d
      IntVar c10 = model.intVar("10*c",new int[]{0,10,20,30,40,50,60,70,80,90});
      model.arithm(c10,"=",c,"*",10);
      model.arithm(cd,"=",c10,"+",b).post();

I believe the error is on line 54:

      model.arithm(cd,"=",c10,"+",b).post();

The b here should be a d.

I haven't actually run the updated program but from scanning through, that's the only error I 
can see - I believe it should give the right answer with that change!

Regards,
Markus