import Control.Monad
import Data.Maybe
import qualified Data.ByteString.Char8 as BS
import Data.List

readInt = fst . fromJust . BS.readInt
readIntList = map readInt . BS.words
getInt = readInt <$> BS.getLine
getIntList = readIntList <$> BS.getLine

main = do
    [d,s,t] <- getIntList
    let a = (d-1) `div` s + 1
    putStrLn $ if a <= t then "Yes" else "No"