1. Description

We try to build a simple website login.

• Username: "admin"
• Password: "123456"

The login page follows rules

• User can always input username and password
• If the input username is not "admin", print "Account doesn't exist"
• If the username / password combination is correct, print "Login Success"
• If the password is incorrect, print "Incorrect password, please retry"
• If the user makes 5 incorrect passowrd, print "Too many fails, the account is protected"
• The user can still input when the account is protected, but everytime it will print "The account is protected, please contact customer service"

2. Submission

• Finish your code in Lecture Note
• Click the "递交 / Submit" button on the right，paste your code and submit
• You can ignore the error report after submission (because the teacher didn't set auto-rating for this problem)