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rang the bell.

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Is it some strange hotel where the room numbers are posted inside the rooms but not in the hallway/outside?  If the friend is told to meet the man in room ##, he would only know if he was ringing room ## after his friend answered the door.


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Ok, maybe my question is not specific enough.

- There is only one room, not hotel.
- The man inside the room, is giving information to his friend outside the room, by pushing the bell button once.
- there is only 1 bell, and it just ring, not stated something.
- The man inside the room, can't control how long the bel ring.
- the number is between 0 and 100.

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