The first prisoner takes the light bulb out of the socket and breaks it so that there are at least 99 pieces of glass. He takes all but 99 of the pieces away. Each prisoner will take one piece of glass away with them on their FIRST time. If they go twice, they don't take a second piece of glass. When there is only one piece of glass left, that person knows that everyone else has been into the room at least once and he can make his assertion.
Slashdot Mirror
I tend to like this one a little bit more:1 5/fuckingpaperclip.png
http://i11.photobucket.com/albums/a154/jennifairy
- use the safety glass too... or something - windows?
The first prisoner takes the light bulb out of the socket and breaks it so that there are at least 99 pieces of glass. He takes all but 99 of the pieces away. Each prisoner will take one piece of glass away with them on their FIRST time. If they go twice, they don't take a second piece of glass. When there is only one piece of glass left, that person knows that everyone else has been into the room at least once and he can make his assertion.