: Prisoner Puzzle v1.0 : the set-up
: 'n' people are captured and thrown in prison for
eternity. The Warden of the prison
: keeps them all in solitary confinement, but gaurantees that
they will each receive
: an infinite number of showers over time. However, the Warden
sets the schedule
: of which prisoners shower on which days. Exactly one prisoner
showers each day,
: and there is only one shower room. The prisoners can use the
light-switch in the
: shower room (but nothing else) to communicate, i.e. they can
change the state
: of the light (on or off) if they so choose, when they shower,
and the Warden will
: not disturb its state.
:The Warden tells the prisoners on their first day these rules,
and also that if, after
: any amount of time, one of them can correctly claim that all
'n' prisoners have
: had at least one shower, then they will all go free. Otherwise,
they are all executed.
: Assuming the prisoners were able to discuss their strategy before
being locked up,
: how can they all be freed?
: Good luck!
: To the answer