#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] == '-')continue;
        for(int j = 0;j < S.length();j++){
            if(S[j] == '+' || S[j] == '-'){
                val += atoi(S.substr(index,j-index).c_str());
                index = j+1;
            }
        }
        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;
}