#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<cctype>
#include<cstdlib>
#include<algorithm>
#include<bitset>
#include<vector>
#include<list>
#include<deque>
#include<queue>
#include<map>
#include<set>
#include<stack>
#include<cmath>
#include<sstream>
#include<fstream>
#include<iomanip>
#include<ctime>
#include<complex>
#include<functional>
#include<climits>
#include<cassert>
#include<iterator>
#include<valarray>
//#include<bits/stdc++.h>
//using namespace std;
using namespace std;

string s;
int main(){
	cin >> s;
	int maxt = INT_MIN;
	for (int i = 0; i < s.size(); i++){
		char kari = s[0];
		s.erase(0, 1);
		s.push_back(kari);
		if (s[0] >= '0'&&s[0] <= '9'){

		}
		else{
			continue;
		}
		if (s.back() >= '0'&&s.back() <= '9'){

		}
		else{
			continue;
		}
		stringstream ss;
		ss << s;
		int kk = 0;
		ss >> kk;
		char op;
		while (ss >> op){
			int num;
			ss >> num;
			if (op == '-'){
				kk -= num;
			}
			else{
				kk += num;
			}
		}
		maxt = max(maxt, kk);
	}
	printf("%d\n", maxt);
	return 0;
}