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

fun findAns a b =
    if a = b then "0"
    else if a < b then "+" ^ (Int.toString (b - a))
    else "-" ^ (Int.toString (a - b))


val () =
    let
        val a = readInt ()
        val b = readInt ()
        val ans = findAns a b
    in
        print (ans ^ "\n")
    end