fun readInt () =
    valOf (TextIO.scanStream (Int.scan StringCvt.DEC) TextIO.stdIn)


val () =
    let
        val n = readInt ()

        val ans = if n mod 3 = 0 then 0
                  else if n mod 3 = 1 then 2
                  else 1        (* n mod 3 = 2 *)
    in
        print (Int.toString ans ^ "\n")
    end