#include <bits/stdc++.h>
#include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<vector>
#include<set>
#include<list>
#include<queue>
#include<math.h>
#include<bitset>
using ll = long long;
using namespace std;


int main(){
    string s;
    cin >> s;
    deque<string> dq1;
    for (int i = 0; i < s.size(); i++){
        string f, b;
        f = s.substr(0, i);
        b = s.substr(i);
        b += f;
        if (b[0] != '+' && b[0] != '-' && b[b.size()-1] != '+' && b[b.size()-1] != '-') dq1.push_back(b);
    }
    int ans = 0;
    while (!dq1.empty()) {
        string num = "";
        string ss = dq1.front();
        char op = '\0';
        int tmp = 0;
        for (int i = 0; i < ss.size(); i++){
            if (ss[i] >= '0' && ss[i] <= '9') num += ss[i];
            else {
                if (op == '\0' || op == '+') tmp += stoi(num);
                else tmp -= stoi(num);
                num = "";
                if (ss[i] == '+') op = '+';
                else op = '-';
            }
            if (i == ss.size() - 1){
                if (op = '+') tmp += stoi(num);
                else tmp -= stoi(num);
            }
        }
        ans = max(ans, tmp);
        dq1.pop_front();
    }
    cout << ans << endl;
}