def gradingStudents(grades):
    rounded_grades = list()
    
    for grade in grades:
        next_multiple = 5 * math.ceil(grade / 5)
        
        if grade < 38:
            rounded_grades.append(grade)
        else:
            if (next_multiple - grade) < 3:
                rounded_grades.append(next_multiple)
            else:
                rounded_grades.append(grade)
                
    return rounded_grades