JS

function solve(input) {
   let negativeGradesLimit = Number(input.shift());

   let countOfBadGrades = 0;
   let sumGrades = 0;
   let gradesCounter = 0;
   let lastProblem;
   let avgGrade;

    while(countOfBadGrades < negativeGradesLimit) {
         let nameOfExercise = input.shift();
           let grade = Number(input.shift());

          if(nameOfExercise == "Enough") {
             avgGrade = sumGrades / gradesCounter;
               console.log(`Average score: ${avgGrade.toFixed(2)}`);
               console.log(`Number of problems: ${gradesCounter}`);
               console.log(`Last problem: ${lastProblem}`);
               break;
           }
              if(grade <= 4) {
                countOfBadGrades++;
              }

                sumGrades += grade;
                gradesCounter++;
                lastProblem = nameOfExercise;
           }
               if(countOfBadGrades == negativeGradesLimit) {
                   console.log(`You need a break, ${countOfBadGrades} poor grades.`);
               }

}