cant the first person tell the person in front what colour hat they are wearing and so on... then so long as they are all truthfull all should be saved exept the first one who only has a 50/50 chance.
Thank you! I was wondering if I was the only one who thought of that.
The questions are "...find a way to guarantee the freedom of some prisoners tomorrow? How many?"
So I agree 100%, the best answer is:
Each person simply states the color of the person's hat in front of them.
If they are honest, that guarantees 19 live and the first person has a 50% chance!
Pretty good odds, but I still wouldn't want to be the first person in line, or in front of someone who had it out for me. 8^)