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


val () =
    let
        val n = readInt ()
        val m = readInt ()
        val k = readInt ()

        val ans = if m + k <= n then "Yes"
                  else "No"
    in
          print (ans ^ "\n")
    end