# coding: utf-8
def 🎍?(🎍)
	return 🎍[0] != 🎍[2] && ((🎍[0]<🎍[1] && 🎍[1]>🎍[2]) || (🎍[0]>🎍[1] && 🎍[1]<🎍[2]))
end

🎍 = gets.split.map(&:to_i)
if 🎍?(🎍) then
	puts "INF"
else
	🎍🎍🎍 = 0
	for 🔪 in 1..1000 do
		🎍🎍 = 🎍.map{|🎋| 🎋%🔪}
		if 🎍?(🎍🎍) then
			🎍🎍🎍 += 1
		end
	end
	puts 🎍🎍🎍
end