#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int solve(const string& s)
{
    int n = s.size();
    int ans = 0;
    int i = 0;
    while(i < n){
        int x = 0;
        int j = i;
        while(j < n && isdigit(s[j])){
            x *= 10;
            x += s[j] - '0';
            ++ j;
        }
        if(i == 0 || s[i-1] == '+')
            ans += x;
        else
            ans -= x;
        i = j + 1;
    }
    return ans;
}

int main()
{
    string s;
    cin >> s;
    int n = s.size();

    int ans = INT_MIN;
    for(int i=0; i<n; ++i){
        if(isdigit(s[0]) && isdigit(s[n-1]))
            ans = max(ans, solve(s));
        rotate(s.begin(), s.begin() + 1, s.end());
    }
    cout << ans << endl;

    return 0;
}