In an island, there are "n" men with blue eyes.
The day a man realises that he has blue eyes, he dies.
Everyday, each man meets all the other men in that island.
The total population of the island & "n" are unknown.
All the men in the island are dumb & can not convey any message to the other in any way.
All the men know that there are some men in the island with blue eyes.
How many days will it take for all the "n" men with blue eyes to die