a = gets.split.map(&:to_i)
if a.uniq.size != 3
  p 0
elsif a.min == a[1] || a.max == a[1]
  puts 'INF'
else
  count = 0
  (2..a.max).each do |i|
    x = a.map{|j| j % i}
    count += 1 if x.uniq.size == 3 && (x.min == x[1] || x.max == x[1])
  end
  p count
end