using System;

class Tsutsu
{
	public static void Main(string[] args)
	{
		string S = Console.ReadLine();
		int max = int.MinValue;
		string s, t;
		s = S.Substring(0, 1);
		t = S.Substring(S.Length-1, 1);
		if(s != "+" && s!= "-" && t!= "+" && t != "-")
			max = calc(S);
		for(int i=0; i<S.Length-1; i++)
		{
			s = S.Substring(i,1);
			t = S.Substring(i+1, 1);
			if(s != "+" && s!= "-" && t!= "+" && t != "-")
			{
				string cut = S.Substring(i+1) + S.Substring(0, i+1);
				max = Math.Max(max, calc(cut));
			}
		}
		Console.WriteLine(max);
	}

	static int calc(string exp)
	{
		int result=0;
		int val = 0;
		int op = 0;
		for(int i=0; i<exp.Length; i++)
		{
			string s = exp.Substring(i, 1);
			if(s == "+" || s == "-")
			{
				if(op == 0)
					result += val;
				else
					result -= val;
				val = 0;
				if(s == "+")
					op = 0;
				else
					op = 1;
			}
			else
			{
				val *= 10;
				val += int.Parse(s);
			}
				
		}
		if(op == 0)
			result += val;
		else
			result -= val;
		return result;

	}
}