-- yukicoder My Practice
-- author: Leonardone @ NEETSDKASU


isKadomatsuRetsu :: [Int] -> Bool
isKadomatsuRetsu [a1, a2, a3] = a1 /= a3 && (isMinA2 || isMaxA2)
    where
        isMinA2 = a2 < a1 && a2 < a3
        isMaxA2 = a2 > a1 && a2 > a3

main = putStrLn . solve . map read . words =<< getLine

solve [a1, a2, a3] = if isKadomatsuRetsu a123 then "INF" else show count
    where
        a123 = [a1, a2, a3]
        maxval = maximum a123
        modKadomatsu p = map (`mod` p) a123
        counter = isKadomatsuRetsu . modKadomatsu
        count = length $ filter counter [1 .. maxval]