using System;
using System.IO;
using System.Linq;
using System.Text;
using System.Collections.Generic;
using System.Diagnostics;
using System.Numerics;
using Enu = System.Linq.Enumerable;

class Program
{
    public void Solve()
    {
        var S = Reader.String();
        long ans = long.MinValue;

        for (int i = 0; i < S.Length; i++)
        {
            string s = "";
            for (int d = 0; d < S.Length; d++)
                s += S[(i + d) % S.Length];
            long n = Calc(s);
            ans = Math.Max(ans, n);
        }

        Console.WriteLine(ans);
        Console.ReadLine();
    }

    long Calc(string s)
    {
        if (!char.IsDigit(s[0]) || !char.IsDigit(s.Last())) return long.MinValue;
        s += "!";
        long res = 0;
        var plus = new List<bool>();
        var x = new List<long>();
        for (int i = 0; i < s.Length; i++)
        {
            if (s[i] == '+') { plus.Add(true); x.Add(res); res = 0; }
            else if (s[i] == '-') { plus.Add(false); x.Add(res); res = 0; }
            else if (s[i] == '!') { x.Add(res); }
            else res = res * 10 + s[i] - '0';
        }
        if (plus.Count == 0) return res;
        res = x[0];
        for (int i = 0; i < plus.Count; i++)
            if (plus[i])
                res += x[i + 1];
            else
                res -= x[i + 1];
        return res;
    }


}


class Entry { static void Main() { new Program().Solve(); } }
class Reader
{
    private static TextReader reader = Console.In;
    private static readonly char[] separator = { ' ' };
    private static readonly StringSplitOptions op = StringSplitOptions.RemoveEmptyEntries;
    private static string[] A = new string[0];
    private static int i;
    private static void Init() { A = new string[0]; }
    public static void Set(TextReader r) { reader = r; Init(); }
    public static void Set(string file) { reader = new StreamReader(file); Init(); }
    public static bool HasNext() { return CheckNext(); }
    public static string String() { return Next(); }
    public static int Int() { return int.Parse(Next()); }
    public static long Long() { return long.Parse(Next()); }
    public static double Double() { return double.Parse(Next()); }
    public static int[] IntLine() { return Array.ConvertAll(Split(Line()), int.Parse); }
    public static int[] IntArray(int N) { return Enu.Range(0, N).Select(i => Int()).ToArray(); }
    public static int[][] IntTable(int H) { return Enu.Range(0, H).Select(i => IntLine()).ToArray(); }
    public static string[] StringArray(int N) { return Enu.Range(0, N).Select(i => Line()).ToArray(); }
    public static string Line() { return reader.ReadLine().Trim(); }
    private static string[] Split(string s) { return s.Split(separator, op); }
    private static string Next() { CheckNext(); return A[i++]; }
    private static bool CheckNext()
    {
        if (i < A.Length) return true;
        string line = reader.ReadLine();
        if (line == null) return false;
        if (line == "") return CheckNext();
        A = Split(line);
        i = 0;
        return true;
    }
}