#include<cstdio>
#include<iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>
#include<limits>

using namespace std;
typedef long long ll;
typedef pair<int, int> pi;
typedef pair<ll, ll> pl;
typedef pair<ll, string> pls;

int main()
{
	string S; cin >> S;
	int S_size = S.size();
	S = S + S;

	ll ans = -100000000000;

	for (int i = 0; i < S_size; i++) {
		string str = "";
		for (int j = i; j < S_size+i; j++) {
			if (j == i || j == S_size + i-1) {
				if (S[j] < '0' || S[j] > '9')break;
			}
			str += S[j];
		}
		ll sum = 0;
		if (str.size() == S_size) {
			string figure = "",ope = "+";
			for (int j = 0; j < str.size(); j++) {
				if (str[j] >= '0' && str[j] <= '9') {
					figure += str[j];
				}
				else{
					if (ope == "+") 
						sum = sum + stoll(figure);
					else if(ope == "-")
						sum = sum - stoll(figure);
					ope = str[j];
					figure = "";
				}
				if (j == str.size() - 1) {
					if (ope == "+") {
						sum = sum + stoll(figure);
					}
					else if (ope == "-")
						sum = sum - stoll(figure);
					ope = str[j];
				}
			}
		}
		if(sum != 0)
			ans = max(ans,sum);
	}
	cout << ans << endl;
	return	0;
}