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, the main problem you meet now is Time Exceeded. And the exit code of your program is -9, which should be 0.
Please double check your code to solve this problem and try again.
Your Answer
Welcome to the library management system, please type your commands. > Test added to the system. > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > Unknown command! > added to the system. > added to the system. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > The customer ID already exists. > Th
JOJ Answer
Welcome to the library management system, please type your commands. > Test Robustness of Invalid Command added to the system. > Unknown command! > Unknown command! > Student M added to the system. > Unknown command! > Unknown command! > Unknown command! > Success! Test Robustness of Invalid Command is borrowed by Student M. > Success! The following book has been returned: 0 Test Robustness of Invalid Command > Unknown command! > Unknown command! > Exit the system!