坑:I just realize one room number is not available
妖妖灵
楼主 (文学城)
in our hospital.
Background: Each floor's room numbers start from 01 to 80 and every room number is 3 digits.
For example, the room numbers on the 4th floor would be from 401 to 480.
The number of the answer is above the 3rd floor.
Can you take a guess what room number is missing?