Notes
This function is in beta test. Please help improve it in the issues
here.
Hints
Your answer may be identical to the JOJ answer in the first several lines.
However, you will still get Wrong Answer because the complete output may be longer and there might be errors in the future lines.
Please double check your code to solve this problem and try again.
Your Answer
Welcome to the library management system, please type your commands. > There is no book in the system. > There is no customer in the system. > book1 added to the system. > book1 added to the system. > book1 added to the system. > book1 added to the system. > The book ID already exists. > book3 added to the system. > 1 book1 on shelf 12 book1 on shelf 123 book1 on shelf 234 book1 on shelf 245 book3 on shelf > 123 book1 on shelf > 12 book1 on shelf > 1book1on shelf > There is no customer in the system. > Exit the system!
JOJ Answer
Welcome to the library management system, please type your commands. > There is no book in the system. > There is no customer in the system. > book1 added to the system. > book1 added to the system. > book1 added to the system. > book1 added to the system. > The book ID already exists. > book3 added to the system. > 1 book1 on shelf 12 book1 on shelf 123 book1 on shelf 234 book1 on shelf 245 book3 on shelf > 123 book1 on shelf > 12 book1 on shelf > 1 book1 on shelf 12 book1 on shelf 123 book1 on shelf 234 book1 on shelf > There is no customer in the system. > Exit the system!