import Control.Applicative

main :: IO ()
main = solve <$> f >>= mapM_ putStrLn
  where
    f = map read <$> words <$> getLine

solve :: [Int] -> [String]
solve [t, a, b]
  | mp < 0 = ["NO"]
  | otherwise = ["YES"] ++
                take (mp `div` 2 * 2) (cycle [">", "<"]) ++
                (if even mp then ["^>"] else [">","^"]) ++
                replicate (min a b - 1) "^>" ++
                (if a > b then replicate (a - b) ">" else replicate (b - a) "^")
  where
    mp = t - min a b - abs (a - b)