import Control.Applicative ((<$>))

main :: IO ()
main = do
  solve <$> map read .words <$> getLine >>= putStrLn
solve :: [Int] -> String
solve [a1, a2, a3]
  | kadomatsu a1 a2 a3 = "INF"
  | a1 == a2 || a2 == a3 || a3 == a1 = "0"
  | otherwise = show $ loop (maximum [a1, a2, a3]) 0
  where
    loop p c
      | p == 0 = c
      | kadomatsu (a1 `mod` p) (a2 `mod` p) (a3 `mod` p) = loop (p - 1) (c + 1)
      | otherwise = loop (p - 1) c

kadomatsu :: Int -> Int -> Int -> Bool
kadomatsu x y z = x /= z && (x < y && y > z || x > y && y < z)