#include <bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
	string s;
	int x;
	long long ans = 0;

	cin >> s;
	for(int i = 0 ; i < 2*s.size() ; i++){
		try{
			if( s[0] == '+' || s[0] == '-' ) throw "";
			if( s[s.size()-1] == '+' || s[s.size()-1] == '-' ) throw "";
			
			int r = 0;
			int now;
			
			for(int j = 0 ; j+1 < s.size() ; j++){
				if( s[j] == s[j+1] && (s[j] == '+'||s[j]=='-') ) throw "";
				
			}
			int p = 1;
			//cout << s << endl;
			for(int j = 0 ; j < s.size() ; ){
				int now = 0;
				int k = j;
				while( s[k] >= '0' && s[k] <= '9' )
					now = now * 10 + s[k++] - '0';
				r += p * now;
				if( s[k++] == '-' ) p = -1;
				else p = 1;
				j = k;
			}
			ans = max(ans,r);
		}catch(const char *msg){
			
		}
		rotate(s.begin(),s.begin()+1,s.end());
	}
	cout << ans << endl;
	
}