50 people in the village, each has a dog. There is a disease in these 50 dogs (this disease will not be infected). So people will find out the dog. Everyone can observe other 49 dogs to determine whether they are sick (if there must be seen), just their dogs can't see. The results obtained after observation must not be exchanged, and the owner of the disease dog cannot be notified. Once the owner, once his family is a disease, the dog is a dog, it is to shoot his dog (see you must shoot in one day after discovery), and everyone only has the right to shoot her own dog, there is no right to kill other people's dogs. On the first day, everyone was finished, but the gun did not ring, and there was still no gun on the next day. In the third day, a gunshot came, asked a total of a few sick dogs in the village, how to calculate it?
Personal answer (for reference only)
3, the reason is very simple: if there is, the owner sees that others will kill themselves! 1, 1 day no-> Description Everyone has two or 2 days without killing -> Description Everyone has two 3, 3 days of killing outside -> Description I know that my own affirmation is also sick, Otherwise, there will be no one else can basically have the following: n Killing has n dog (n <= all)
