module Main where

import Control.Monad
import Data.Ratio

amt :: Int -> Int -> Int
amt exp xs = case exp `divMod` xs of
    (q, 0) -> q
    (q, _) -> q + 1

main :: IO ()
main = do
    [a, b, c] <- replicateM 3 readLn :: IO [Int]
    let x = amt a b
    let y = amt a c
    if (y % x) <= (2 % 3)
        then putStrLn "YES"
        else putStrLn "NO"