
Find a solution that maximises the “how many messages are being transmitted” variable.Find a solution that minimizes the “cost of doing business” variable.If you’re looking for the best solution, then you need to define a set of cost variables that you aim to minimise or maximise. If you’re looking for any solution, then you’re done.One set must be a compliment of another set.One variable must be the sum/max/min of a few other variables.If one variable has a value, the other variable must have a different value.Then you define the constraints for these variables, for example:.This variable is a set of between 4 and 10 numbers, that are all taken from a domain running from 1 to 99.This variable can have any value between 1 and 42.This variable has to have the value of 3.Then you define the domains in which these variables exist.
#Solved sudoku how to
In short: you tell the program what problem needs to be solved, but not how to solve that problem. What is constraint programming?Ĭonstraint programming is a paradigm for programming that can be a little unusual the first time you come to it, since it’s completely different to imperative programming. This post outlines a solution using constraint programming with choco solver.


Sudoku is one of these types of problems, but it has very simple rules, so it’s a nice playground to try out different ways to solve graph colouring problems. This last problem type is a graph colouring problem, and the nature of these is that solving one of them is much the same as solving another.

“Do this same task to as many things as possible, as quickly as possible”.“Let me create, read, update and delete these things”.Enterprise application development is, for the most part, solving one of these types of problems:
