It's n-1. I should have put the number of chairs in the question. I wasn't really trying to quiz everyone here, just identify which mind bender it was. The "

It's n-1. I should have put the number of chairs in the question. I wasn't really trying to quiz everyone here, just identify which mind bender it was. The "twist" on the answer is that you start below all the other chairs and finish above all the other chairs, so you must have passed them all along the way. I saw this immediately and answered "99" or whatever it was. In retrospect, I think they couldn't conceive of anyone figuring it out on the fly.