private void optimizeMathe(){
        //Mathe: 4 hjs mandatory
        if(myData.subjects[MATHE].writtenExamSubject==false){
            int hjsToAdd;
            if(myData.subjects[MATHE].oralExamSubject==true){
                hjsToAdd = 3; //since 13.2 is already in C
            } else {hjsToAdd = 4;}
            
            for(int hj=0; hj<hjsToAdd; hj++){
                bScore += myData.subjects[MATHE].semesters[hj].mark;
                myData.subjects[MATHE].semesters[hj].usedState = Semester.UsedState.mandLegible;
                
                if (myData.subjects[MATHE].semesters[hj].mark>=5) failer.add1ToCounter();
            }
        }
    }