docs: @Override
    public void evaluate(IntegerDoubleSolution solution) {
      int approximationToN;
      int approximationToM ;
  
      approximationToN = 0;
      approximationToM = 0;
  
      for (int i = 0; i < solution.getNumberOfIntegerVariables(); i++) {
        int value = solution.getVariableValue(i).intValue() ;
        approximationToN += Math.abs(valueN - value) ;
        approximationToM += Math.abs(valueM - value) ;
      }
  
      for (int i = solution.getNumberOfIntegerVariables(); i < (solution.getNumberOfIntegerVariables()+solution.getNumberOfDoubleVariables()); i++) {
        double value = solution.getVariableValue(i).doubleValue() ;
        approximationToN += Math.abs(valueN - value) ;
        approximationToM += Math.abs(valueM - value) ;
      }
  
      solution.setObjective(0, approximationToN);
      solution.setObjective(1, approximationToM);
    }