import java.util.Scanner

object Problem193 {

  def main(args: Array[String]) {
    val sc = new Scanner(System.in)
    val s = sc.next

    // 1文字ずつ回転
    val results = for (i <- 0 until s.length) yield {
      val (pre, post) = s.splitAt(i)
      val rolledStr = post + pre

      val values: Array[String] = rolledStr.split("[+-]")
      val ops: Array[Char] = '+' +: rolledStr.filter(!_.isDigit).toArray

      if (values.length == ops.length && !values.contains("")) {
        val exprs: Array[(String, Char)] = values.zip(ops)
        val res = for (expr <- exprs) yield {
          expr match {
            case (x, '+') => x.toInt
            case (x, '-') => -x.toInt
          }
        }
        Some(res.sum)
      } else {
        None
      }
    }

    println(results.max.get)
  }
}