package main

import (
	"fmt"
	"io"
	"os"
)

func calc(t []byte) int {
	sign, temp, sum := 1, 0, 0
	for i := 0; i < len(t); i++ {
		if t[i] == '-' {
			sum += sign * temp
			temp = 0
			sign = -1
			continue
		}
		if t[i] == '+' {
			sum += sign * temp
			temp = 0
			sign = 1
			continue
		}

		temp = temp * 10
		temp += int(t[i] - '0')
	}
	sum += sign * temp
	return sum
}

func solve(in io.Reader, out, err io.Writer) {
	var origin []byte
	fmt.Fscan(in, &origin)

	var temp []byte
	max := -9999999999

	for i := 1; i < len(origin); i++ {
		if origin[i-1] == '-' || origin[i-1] == '+' {
			continue
		}
		if origin[i] == '-' || origin[i] == '+' {
			continue
		}

		temp = append(origin[i:], origin[:i]...)
		result := calc(temp)
		if max < result {
			max = result
		}
	}

	result := calc(origin)
	if max < result {
		max = result
	}

	fmt.Fprintf(out, "%d", max)

}

func main() {
	solve(os.Stdin, os.Stdout, os.Stderr)
}