Codefights metroCard

// sample solution

function metroCard(lastNumberOfDays) {
    // daysInMonths = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
    if(lastNumberOfDays == 30){
        return [31];
    } else if (lastNumberOfDays == 31){
        return [28, 30, 31];
    } else {
        return [31];
    }
}