@PostMapping("/addanswer")
    public String editAnswer(
            @RequestParam(name = "idQ")Long idQ,
            @RequestParam(name = "answ")String answ,
            @RequestParam(name ="b",required = false)String b
    ){
        Answer a=new Answer();
        a.setQuestion(questionRepo.findById(idQ).get());
        a.setAnswerText(answ);
            a.setMatch(b!=null);
        answerRepo.save(a);
        return "redirect:/addanswer";
    }