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. > Test1 added to the system. > 1 Test1 on shelf > The book ID already exists. Test1 added to the system. > 1 Test1 on shelf > c1 added to the system. > 1 c1 > The customer ID already exists. c1 added to the system. > 1 c1 > Exit the system!
JOJ Answer
Welcome to the library management system, please type your commands. > Test1 added to the system. > 1 Test1 on shelf > The book ID already exists. > 1 Test1 on shelf > c1 added to the system. > 1 c1 > The customer ID already exists. > 1 c1 > Exit the system!