//-std=c++14
#include<bits/stdc++.h>
using namespace std;
main(){
    string S;
    cin >> S;
    int maxi = -100000000;
    for(int i = 0;i < S.length();i++){
        int index = 0,val = 0;
        if(S.front() != '+' && S.front() != '-' &&
            S.back() != '+' && S.back() != '-'){
            for(int j = 0;j < S.length();j++){
                if(S[j] == '+' || S[j] == '-'){
                    val += stoi(S.substr(index,j-index));
                    index = j;
                }
            }
            val += stoi(S.substr(index,S.length()-index));
            maxi = max(maxi,val);
        }
        S = S.back() + S;
        S.pop_back();
    }
    cout << maxi << endl;
}