examPreparation(Eli).js

function exam(input) {
    let index = 0;
    let badGradesAllowed = Number(input[index]);
    index++;
    let command = input[index];
    index++;

    let badGrades = 0;
    let sumGrades = 0;
    let taskCounter = 0;
    let examPass = true;

    while (command !== "Enough") {
        let currentGrade = Number(input[index]);
        index++;
        taskCounter++;
        sumGrades += currentGrade;

        if (currentGrade <= 4) {
            badGrades++;
        }
        if (badGrades === badGradesAllowed) {
            examPass = false;
            console.log(`You need a break, ${badGrades} poor grades.`);
            break;
        }

        command = input[index];
        index++;
    }
    let average = sumGrades / taskCounter;
    let lastTask = input[index - 3];

    if (examPass) {
        console.log(`Average score: ${average.toFixed(2)}`);
        console.log(`Number of problems: ${(taskCounter)}`);
        console.log(`Last problem: ${lastTask}`);
    }
}

exam(["3", "Money", "6", "Story", "4", "Spring Time", "5", "Bus", "6", "Enough"]);
exam(["2", "Income", "3", "Game Info", "6", "Best Player", "4"]);