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


val () =
    let
        val a = readInt ()
        val b = readInt ()

        fun findAns 0 0 acc = acc
          | findAns x 0 acc = findAns (x - 1) 200 acc
          | findAns x y acc =
            (* floor x / (x + y) * 100 + 0.5 *)
            if (x * 100 + ((x + y) div 2)) div (x + y) = a andalso
               (y * 100 + ((x + y) div 2)) div (x + y) = b
            then findAns x (y - 1) (Int.min (acc, x + y))
            else findAns x (y - 1) acc

        val ans = findAns 200 200 400

    in
        print (Int.toString ans ^ "\n")
    end