using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
using System.Text.RegularExpressions;
using System.Linq;
using System.IO;

class Program
{
    static private Magatro M = new Magatro();
    static private void Main(string[]args)
    {
        M.Scan();
        M.Solve();
    }
}

public class Scanner
{
    private string[] S;
    private int Index;
    private char Separator;

    public Scanner(char separator = ' ')
    {
        Index = 0;
        Separator = separator;
    }

    private string[] Line()
    {
        return Console.ReadLine().Split(Separator);
    }

    public string Next()
    {
        string result;
        if (S == null || Index >= S.Length)
        {
            S = Line();
            Index = 0;
        }
        result = S[Index];
        Index++;
        return result;
    }
    public int NextInt()
    {
        return int.Parse(Next());
    }
    public double NextDouble()
    {
        return double.Parse(Next());
    }
    public long NextLong()
    {
        return long.Parse(Next());
    }
}

public class Magatro
{
    private string S;
    public void Scan()
    {
        Scanner sc = new Scanner();
        S = sc.Next();
    }

    public void Solve()
    {
        long ans = int.MinValue;
        for(int i = 0; i < S.Length; i++)
        {
            string ss = "";
            for (int j = i; j < S.Length; j++)
            {
                ss += S[j].ToString();
            }
            for(int j = 0; j < i; j++)
            {
                ss += S[j].ToString();
            }
            ans = Math.Max(ans, Anser(ss));
        }
        Console.WriteLine(ans);
    }
    private long Anser(string s)
    {
        if (s[0] == '+' || s[0] == '-') return -9999999999;
        if (s[s.Length - 1] == '+' || s[s.Length - 1] == '-') return -9999999999;
        long ans = 0;
        string temp = "";
        bool plus = true;
        for(int i = 0; i < s.Length; i++)
        {
            switch (s[i])
            {
                case '+':
                    if (plus)
                    {
                        ans += long.Parse(temp);
                    }
                    else
                    {
                        ans -= long.Parse(temp);
                    }
                    plus = true;
                    temp = "";
                    break;
                case '-':
                    if (plus)
                    {
                        ans += long.Parse(temp);
                    }
                    else
                    {
                        ans -= long.Parse(temp);
                    }
                    plus = false;
                    temp = "";
                    break;
                default:
                    temp += s[i];
                    break;
            }
        }
        if (plus)
        {
            ans += long.Parse(temp);
        }
        else
        {
            ans -= long.Parse(temp);
        }
        return ans;
    }
}