#lex_auth_012736365493280768607
#Implement Student class here
class Student:
    def __init__(self) -> None:
        self.__student_id = None
        self.__marks = None
        self.__age = None
        self.__course_id = None
        self.__fees = None   
    def validate_marks(self):
        if self.__marks>= 0 and self.__marks <= 100:
            return True
        return False
    def validate_age(self):
        if self.__age > 20:
            return True
        return False
    
    def check_qualification(self):
        if self.validate_age() and self.validate_marks():
            if self.__marks >= 65:
                return True
        return False
    
    def set_marks(self, marks):
        self.__marks = marks
    def set_student_id(self, student_id):
        self.__student_id = student_id
        
    def set_age(self, age):
        self.__age = age
    def get_marks(self):
        return self.__marks
    def get_student_id(self):
        return self.__student_id
        
    def get_age(self):
        return self.__age
    
    def choose_course(self, course_id):
        if course_id == 1001 or course_id == 1002:
            self.__course_id = course_id
            self.__fees = 25575.0 if course_id == 1001 else 15500.0
            if self.__marks > 85:
                self.__fees = 0.75 * self.__fees
            return True
        
        return False
    def get_course_id(self):
        return self.__course_id
    def get_fees(self):
        return self.__fees
maddy=Student()
maddy.set_student_id(1004)
maddy.set_age(21)
maddy.set_marks(65)
if(maddy.check_qualification()):
    print("Student has qualified")
    if(maddy.choose_course(1002)):
        print("Course allocated")
    else:
        print("Invalid course id")
else:
    print("Student has not qualified")