using System.Collections.Generic;
using System.Linq;
using System;

public class Hello
{
    public static void Main()
    {
        var ans = new List<int>();
        var s = Console.ReadLine().Trim();
        var sL = s.Length;
        var t = s;
        for (int i = 0; i < sL; i++)
        {
            if (t[0] != '+' && t[0] != '-' && t[sL - 1] != '+' && t[sL - 1] != '-')
                ans.Add(getAns(t));
            t = t.Substring(1) + t[0];
        }
        Console.WriteLine(ans.Max());
    }
    public static int getAns(string s)
    {
        var a = Array.ConvertAll(s.Split('+', '-'), int.Parse);
        var b = new List<int>();
        for (int i = 0; i < s.Length; i++)
            if (s[i] == '+') b.Add(0);
            else if (s[i] == '-') b.Add(1);
        var ans = a[0];
        for (int i = 0; i < b.Count(); i++)
            if (b[i] == 0) ans += a[i + 1];
            else ans -= a[i + 1];
        return ans;
    }
}