minimumDiameter :: [Int] -> Int
minimumDiameter (xp : yp : _)
    | d * d == 4 * r2 = d + 1
    | otherwise       = d
    where
        r2 = xp * xp + yp * yp
        d = ceiling $ (*) 2 $ sqrt $ fromIntegral r2

main :: IO ()
main = print . minimumDiameter . map read . words =<< getLine