#include <algorithm>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <iostream>
#include <map>
#include <memory>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <utility>
#include <vector>
 
using namespace std;
 
#define sz size()
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define all(c) (c).begin(), (c).end()
#define rep(i,a,b) for(int i=(a);i<(b);++i)
#define clr(a, b) memset((a), (b) ,sizeof(a))

#define MOD 1000000007

long long ston(string s){
  long long n;
  sscanf(s.c_str(), "%lld", &n);
  return n;
}

int calc(string s){
	vector<int> v;
	vector<int> vp;
	string a="";
	rep(i,0,s.sz){
		if(s[i]=='+'){
			v.pb(ston(a));
			vp.pb(1);
			a="";
		}
		else if(s[i]=='-'){
			v.pb(ston(a));
			vp.pb(0);
			a="";
		}
		else{
			a+=s[i];
		}
	}
	v.pb(ston(a));
	int ret = v[0];
	rep(i,0,vp.sz){
		if(vp[i]==1){
			ret += v[i+1];
		}
		if(vp[i]==0){
			ret -= v[i+1];
		}
	}
	return ret;
}

int main(){
	string s;
	cin>>s;
	int mx = 0;
	rep(i,0,s.sz){
		string ss;
		rep(j,1,s.sz){
			ss += s[j];
		}
		ss += s[0];
		s=ss;
		if(s[0]=='+'||s[0]=='-'||s[s.sz-1]=='+'||s[s.sz-1]=='-'){
			continue;
		}
		mx = max(mx,calc(s));
	}
	cout << mx << endl;
	return 0;
}