fun readLargeInt () =
    valOf (TextIO.scanStream (LargeInt.scan StringCvt.DEC) TextIO.stdIn)


fun canReach _ 0 0 = true
  | canReach 0 _ _ = false
  | canReach n x y = 
    canReach (n - 1) (x - 2) (y - 1) orelse
    canReach (n - 1) (x - 2) (y + 1) orelse
    canReach (n - 1) (x - 1) (y - 2) orelse
    canReach (n - 1) (x - 1) (y + 2) orelse
    canReach (n - 1) (x + 1) (y - 2) orelse
    canReach (n - 1) (x + 1) (y + 2) orelse
    canReach (n - 1) (x + 2) (y - 1) orelse
    canReach (n - 1) (x + 2) (y + 1)

val () =
    let
        val x = readLargeInt ()
        val y = readLargeInt ()

        val ans = if canReach 3 x y then "YES"
                  else "NO"
    in
        print (ans ^ "\n")
    end