plusplus

4 ms·

1. 1.▲
   by plusplus 14y ago

   I think nhaehnle explained it very nicely.
2. 2.▲
   by plusplus 14y ago

   You do it for all natural numbers n=1, 2, 3 , ... (those are countably infinately many numbers). Because every natural number n has a successor n+1, you can do it for all of them. Each n except 1 has a predecessor n-1 from which guests wher
3. 3.▲
   by plusplus 14y ago

   Yes. They must move to room n+2.