#include<bits/stdc++.h>
using namespace std;
main(){
    string S;
    cin >> S;
    int maxi = 0;
    for(int i = 0;i < S.length();i++){
        int index = 0,val = 0;
        if(S[0] != '+' && S[0] != '-' &&
            S[S.length()-1] != '+' && S[S.length()-1] != '-'){
            for(int j = 0;j < S.length();j++){
                if(S[j] == '+' || S[j] == '-'){
                    val += atoi(S.substr(index,j-index).c_str());
                    index = j;
                }
            }
            val += atoi(S.substr(index,S.length()-index).c_str());
            maxi = max(maxi,val);
        }
        S = S[S.length()-1] + S;
        S.erase(S.length()-1);
    }
    cout << maxi << endl;
}