main = getContents >>= putStrLn . solve . map read . lines

solve :: [Int] -> String
solve [a, b, c]
    | fromIntegral n <= 2.0 * fromIntegral m / 3.0 = "YES"
    | otherwise = "NO"
    where
        n = ceiling $ fromIntegral a / fromIntegral c
        m = ceiling $ fromIntegral a / fromIntegral b