{-# LANGUAGE BangPatterns #-}
data Matrix a = Matrix !a !a !a !a

matrixMul ::  Matrix Integer -> Matrix Integer -> Integer -> Matrix Integer
matrixMul (Matrix a b c d) (Matrix a' b' c' d') n
    = Matrix ((a * a' + b * c') `mod` n) ((a * b' + b * d') `mod` n) ((c * a' + d * c') `mod` n) ((c * b' + d * d') `mod` n)

matrixPow :: Matrix Integer -> Integer -> Integer -> Matrix Integer
matrixPow _ 0 _ = Matrix 1 0 0 1
matrixPow m i n = loop m m (i - 1)
    where
        loop acc !_ 0 = acc
        loop acc m 1  = matrixMul acc m n
        loop acc m i  = case i `quotRem` 2 of
                            (j, 0) -> loop acc (matrixMul m m n) j
                            (j, _) -> loop (matrixMul acc m n) (matrixMul m m n) j

fib :: Integer -> Integer -> Integer
fib i m = let Matrix a b c d = matrixPow (Matrix 0 1 1 1) (i - 1) m
        in b

main :: IO ()
main = interact $ show . solve . map (read :: String -> Integer) . words

solve :: [Integer] -> Integer
solve [n, m] = fib n m