def gradingStudents(grades):
    final_grades = []
    for marks in grades:
        if marks < 38:
            final_grades.append(marks)
            continue
        next_multiple = 5*((marks//5) + 1)
        if next_multiple - marks < 3:
            final_grades.append(next_multiple)
        else:
            final_grades.append(marks)
    
    return final_grades