Grades 100/100

function grades(input) {
    let students = Number(input[0]);

    let fail = 0;
    let average = 0;
    let good = 0;
    let top = 0;

    let totalGrade = 0;

    for (let i = 1; i <= students; i++) {
        let grade = Number(input[i]);

        if (grade <= 2.99) {
            fail++;
            totalGrade += grade;
        } else if (grade <= 3.99) {
            average++;
            totalGrade += grade;
        } else if (grade <= 4.99) {
            good++;
            totalGrade += grade;
        } else {
            top++;
            totalGrade += grade;
        }
    }
    console.log(`Top students: ${(top / students * 100).toFixed(2)}%`);
    console.log(`Between 4.00 and 4.99: ${(good / students * 100).toFixed(2)}%`);
    console.log(`Between 3.00 and 3.99: ${(average / students * 100).toFixed(2)}%`);
    console.log(`Fail: ${(fail / students * 100).toFixed(2)}%`);
    console.log(`Average: ${(totalGrade / students).toFixed(2)}`);
}