#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;

int f(string S) {
    int sign = 1, ret = 0, now = 0;
    bool flag = false;
    S += '+';
    for (auto& c : S) {
        if (c == '+' || c == '-') {
            if (!flag)
                return -INF;
            ret += now * sign;
            now = 0;
            sign = ((c == '+') ? 1 : -1);
            flag = false;
        } else {
            now *= 10;
            now += (c - '0');
            flag = true;
        }
    }
    return ret;
}

int main() {
    string S;
    cin >> S;
    int N = S.length();
    S += S;

    int ans = -INF;
    for (int i = 0; i < N; i++) {
        ans = max(ans, f(S.substr(i, N)));
    }

    cout << ans << endl;
}