fix quiz result logic

Author: vdvibhu20

app/pods/contests/contest/content/quiz/controller.js

@@ -16,15 +16,15 @@ export default class Quiz extends Controller {
   get totalCorrect () {
     const result = this.get('submitQuizTask.lastSuccessful.value.judge_result')
     return result.questions.reduce((acc, question) => {
-      return acc + +question.correctlyAnswered.length
+      return acc + question.questionAnsweredCorrectly ? 1 : 0
     }, 0)
   }
 
   @computed('submitQuizTask.lastSuccessful.value.judge_result')
   get totalIncorrect() {
     const result = this.get('submitQuizTask.lastSuccessful.value.judge_result')
     return result.questions.reduce((acc, question) => {
-      return acc + +question.incorrectlyAnswered.length
+      return acc + question.questionAnsweredCorrectly ? 0 : 1
     }, 0)
   }