#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    string s; cin >> s;
    int n = int(s.size()), ans = -1e9;
    rep(i,n) {
        if(isdigit(s[0]) && isdigit(s.back())) {
            int sgn = +1, num = 0, sum = 0;
            for(char c : s) {
                if(isdigit(c)) {
                    num = num * 10 + c - '0';
                } else {
                    sum += sgn * num;
                    if(c == '+') sgn = +1;
                    if(c == '-') sgn = -1;
                    num = 0;
                }
            }
            sum += sgn * num;
            ans = max(ans, sum);
        }
        s = s.substr(1, n - 1) + s[0];
    }

    cout << ans << endl;
}