YW Moderator-80-
Even though your answer doesn’t work with the described setup, it was very lomdish.
hiijacker-
You should give a hint or two, like:
1) Remember, every person can see all of the hats in front of him. The last person sees 99, the next-to-last sees 98, etc.
2) We can say with certainty that the last person (the one who can see 99 hats) will see an odd number of…