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. > 5 added to the system. > Shuyu.Wu added to the system. > Jigang added to the system. > Success! 5 is borrowed by Jigang. > Fail! The book was borrowed by another customer. > Success! The following book has been returned: 2 5 > Success! 5 is borrowed by Shuyu.Wu. > VG101 added to the system. > Manuel added to the system. > introToElm added to the system. > Success! introToElm is borrowed by Manuel. > 2 5 borrowed 7 VG101 on shelf 9 introToElm borrowed > 1 Shuyu.Wu 3 Jigang 5 Manuel > Book borrowed by Manuel: 9 introToElm > The book ID already exists. > added to the system. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book ID already exists. > The book I
JOJ Answer
Welcome to the library management system, please type your commands. > 5 added to the system. > Shuyu.Wu added to the system. > Jigang added to the system. > Success! 5 is borrowed by Jigang. > Fail! The book was borrowed by another customer. > Success! The following book has been returned: 2 5 > Success! 5 is borrowed by Shuyu.Wu. > VG101 added to the system. > Manuel added to the system. > introToElm added to the system. > Success! introToElm is borrowed by Manuel. > 2 5 borrowed 7 VG101 on shelf 9 introToElm borrowed > 1 Shuyu.Wu 3 Jigang 5 Manuel > Book borrowed by Manuel: 9 introToElm > The book ID already exists. > Success! VG101 is borrowed by Manuel. > Book borrowed by Manuel: 7 VG101 9 introToElm > Exit the system!