#include <cassert>

#include <cctype>
#include <cerrno>
#include <cfloat>
#include <ciso646>
#include <climits>
#include <clocale>
#include <cmath>
#include <csetjmp>
#include <csignal>
#include <cstdarg>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <ccomplex>
#include <cfenv>
#include <cinttypes>
#include <cstdbool>
#include <cstdint>
#include <ctgmath>
#include <cwchar>
#include <cwctype>

// C++
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iosfwd>
#include <iostream>
#include <istream>
#include <iterator>
#include <limits>
#include <list>
#include <locale>
#include <map>
#include <memory>
#include <new>
#include <numeric>
#include <ostream>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <stdexcept>
#include <streambuf>
#include <string>
#include <typeinfo>
#include <utility>
#include <valarray>
#include <vector>
#include <array>
#include <atomic>
#include <chrono>
#include <condition_variable>
#include <forward_list>
#include <future>
#include <initializer_list>
#include <mutex>
#include <random>
#include <ratio>
#include <regex>
#include <scoped_allocator>
#include <system_error>
#include <thread>
#include <tuple>
#include <typeindex>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
//#include <boost/foreach.hpp>
//#include <boost/range/algorithm.hpp>
#define rep(i,j,k) for(int i=(int)j;i<(int)k;i++)
#define ll long long
#define Sort(v) sort(all(v))
#define INF 1000000000
#define END return 0
#define pb push_back
#define se second
#define fi first
#define pb push_back
#define all(v) (v).begin() , (v).end()
#define MP make_pair
#define MOD 1000000007LL
using namespace std;
int day[12]={31,28,31,30,31,30,31,31,30,31,30,31};

ll cluc(string s){
    vector<ll> num;
    vector<char> cmd;
    rep(i,0,s.size()){
        if('0'<=s[i]&&s[i]<='9'){
            ll t=s[i]-'0';
            while(i+1<s.size() && '0'<=s[i+1]&&s[i+1]<='9'){
                i++;
                t*=10;
                t+=s[i]-'0';
            }
            num.pb(t);
        }else cmd.pb(s[i]);
    }
    ll ret=0;
    rep(i,0,num.size()){
        if(i==0)ret+=num[i];
        else{
            if(cmd[i-1]=='+')ret+=num[i];
            else ret-=num[i];
        }
    }
    return ret;
}

signed main (){
    string s;cin>>s;
    s+=s;
    ll ans=-1e18;
    rep(i,0,s.size()/2){
        string sub=s.substr(i,s.size()/2);
        if(sub[0]=='+' || sub[0]=='-')continue;
        if(sub[sub.size()-1]=='+' || sub[sub.size()-1]=='-')continue;
        if(ans<cluc(sub)){
            ans=cluc(sub);
        }
    }
    cout<<ans<<endl;
    
}

/*
1-21-2
*/