#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <vector>
#include <algorithm>
#include <set>
#include <queue>
#include <map>
#include <climits>
#include <sstream>
using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define RREP(i,n) for(int i=(int)n-1; i>=0; i--)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)
#define RFOR(i,c) for(__typeof((c).rbegin())i=(c).rbegin();i!=(c).rend();++i)
#define ALL(c) (c).begin(), (c).end()

typedef long long int ll;
typedef pair<int, int> pii;
typedef pair<int, pair<int, int> > pipii;
typedef vector<int> vi;

const ll INF = 1LL<<40;
const int MOD = 1e9+7;

#define int ll


int calc2(string str){
    int res = 0;
    vector<string> a(str.size(), "");
    vector<char> s;
    int id = 0;
    REP(i, str.size()){
       if(str[i] != '+' && str[i] != '-'){
           if(a[id].size() == 0 && str[i] == '0') continue;
           a[id] += str[i];
       }
       else{
            s.push_back(str[i]);
            id++;
       }
    }
    stringstream ss(a[0]);
    ss >> res;
    if(a[0] == "") res = 0;
    REP(i, s.size()){
        if(a[i+1] == "") continue;
        stringstream sss(a[i+1]);
        int x;
        sss >> x;
        if(s[i] == '+') res += x;
        else res -= x;
    }
    return res;
}

int calc(string s, int i, int n){
    if(s[i] == '+' || s[i] == '-') return -INF;
    if(s[i+n-1] == '+' || s[i+n-1] == '-') return -INF;
    return calc2(s.substr(i, n));
}

signed main(void){
    string s;
    cin >> s;
    int ans = -INF;
    int n = s.size();
    s += s;
    REP(i, n){
        ans = max(ans, calc(s, i, n));
    }
    cout << ans << endl;
	
	return 0;
}