Credit System

function creditSystem(input) {
    let n = Number(input[0]);

    let totalGrades = 0.0;
    let totalCredits = 0.0;

    for (let i = 1; i <= n; i++) {
        let number = Number(input[i]);
        let grade = number % 10;
        let credit = parseInt(number / 10);

        totalGrades += grade;

        if (grade == 2) {
            credit = 0;
        } else if (grade == 3) {
            credit *= 0.50;
        } else if (grade == 4) {
            credit *= 0.70;
        } else if (grade == 5) {
            credit *= 0.85;
        }

        totalCredits += credit;
    }

    console.log(`${totalCredits.toFixed(2)}\n${(totalGrades / n).toFixed(2)}`);
}