abstract class Shape2103 {
    abstract void draw();
}

class Circle2103 extends Shape2103 {
    void draw() {
        System.out.println("Drawing Circle");
    }
}

class Square2103 extends Shape2103 {
    void draw() {
        System.out.println("Drawing Square");
    }
}

public class Task210325 {
    public static void main(String[] args) {
        Shape2103 shape = new Circle2103();
        shape.draw();
        ((Square2103) shape).draw();
    }
}

@Entity
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;

    @PreRemove
    private void beforeRemove() {
        System.out.println("Before removing user: " + this.name);
        // Логика перед удалением
    }

    @PostRemove
    private void afterRemove() {
        System.out.println("User removed with ID: " + this.id);
        // Логика после удаления
    }
}

@Entity
@EntityListeners(UserListener.class)
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String name;
}

public class UserListener {
    @PreRemove
    public void beforeRemove(User user) {
        System.out.println("Before removing user: " + user.getName());
    }

    @PostRemove
    public void afterRemove(User user) {
        System.out.println("User removed with ID: " + user.getId());
    }
}

public class GlobalEntityListener {
    @PreRemove
    public void beforeRemove(Object entity) {
        System.out.println("Before removing entity: " + entity.getClass().getSimpleName());
    }

    @PostRemove
    public void afterRemove(Object entity) {
        System.out.println("Entity removed: " + entity.getClass().getSimpleName());
    }
}

spring.jpa.properties.hibernate.ejb.event.pre-remove=com.example.GlobalEntityListener
spring.jpa.properties.hibernate.ejb.event.post-remove=com.example.GlobalEntityListener

@Query("SELECT u FROM User u WHERE u.email = ?1")
User findByEmail(String email);

@Query(value = "SELECT * FROM users WHERE email = ?1", nativeQuery = true)
User findByEmail(String email);

@Query(value = "SELECT * FROM users WHERE active = true", 
       countQuery = "SELECT COUNT(*) FROM users WHERE active = true", 
       nativeQuery = true)
Page<User> findActiveUsers(Pageable pageable);

@Query(name = "User.findByEmail")
User findByEmail(String email);

@Query(name = "User.findActiveUsers", countName = "User.countActiveUsers")
Page<User> findActiveUsers(Pageable pageable);

@Query("SELECT new com.example.UserDTO(u.id, u.name) FROM User u WHERE u.email = ?1")
UserDTO findUserDtoByEmail(String email);

public class Task240325 {
    static int factorial(int n) {
        if (n == 0 || n == 1) {
            return 1;
        }
        return n * factorial(n - 1);
    }

    public static void main(String[] args) {
        System.out.println(factorial(4));
    }
}