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You are in an office to meet a friend. Your friend has given you his room number and asked you to go directly to his room when you arrive without giving him any call. Now, you are looking for someone who can help you locate the room, but you find everyone is super busy. On a screen, you find that each room number itself explains where the room is located. There are 12 floors on the building, each having two wings: North and South, and each wing has 20 rooms. The ground floor doesn't have any room, it is an open lobby (so the topmost floor is the 11th floor). An example of a room number is 'RN07S12', which means that the room is the 12th room of the South wing on the 7th floor. More examples: RN11N20, RN01S01, RN09N17, etc. Write a regular expression for such room numbers.

You are in an office to meet a friend. Your friend has given you his room number and asked you to go directly to his room when you arrive without giving him any call. Now, you are looking for someone who can help you locate the room, but you find everyone is super busy. On a screen, you find that each room number itself explains where the room is located. There are 12 floors on the building, each having two wings: North and South, and each wing has 20 rooms. The ground floor doesn't have any room, it is an open lobby (so the topmost floor is the 11th floor). An example of a room number is 'RN07S12', which means that the room is the 12th room of the South wing on the 7th floor. More examples: RN11N20, RN01S01, RN09N17, etc. Write a regular expression for such room numbers.

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Question 1(b) You are in an office to meet a friend. Your friend has given you his room number and asked you to go directly to his room when you arrive without giving him any call. Now, you are looking for someone who can help you locate the room, but you find everyone is super busy. On a screen, you find that each room number itself explains where the room is located. There are 12 floors on the building, each having two wings: North and South, and each wing has 20 rooms. The ground floor doesn't have any room, it is an open lobby (so the topmost floor is the 11th floor). An example of a room number is 'RNO7S12', which means that the room is the 12th room of the South wing on the 7th floor. More examples: RN11N20, RNO1S01, RNO9N17, etc. Write a regular expression for such room numbers.
Transcribed Image Text:Question 1(b) You are in an office to meet a friend. Your friend has given you his room number and asked you to go directly to his room when you arrive without giving him any call. Now, you are looking for someone who can help you locate the room, but you find everyone is super busy. On a screen, you find that each room number itself explains where the room is located. There are 12 floors on the building, each having two wings: North and South, and each wing has 20 rooms. The ground floor doesn't have any room, it is an open lobby (so the topmost floor is the 11th floor). An example of a room number is 'RNO7S12', which means that the room is the 12th room of the South wing on the 7th floor. More examples: RN11N20, RNO1S01, RNO9N17, etc. Write a regular expression for such room numbers.
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