#include<iostream>
#include<fstream>
#include<sstream>
#include<string>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<ctime>
#include<stack>
#include<queue>
#include<set>
#include<map>
#include<vector>
#include<list>
#include<algorithm>
#include<utility>
#include<complex>
#include<functional>
using namespace std;
typedef long long Int;
#define num(x) ('0'<=x&&x<='9')
int main(void){
	string S;
	cin >> S;
	int n = S.size();
	Int res = 0;
	for (int i = 0; i < n; i++){
		//bool f = false;
		if (!num(S[i]))continue;
		if (!num(S[(i+n-1)%n]))continue;
/*		for (int j = 0; j < n - 1; j++)
			if (!num(S[(i+j)%n]))
				if (!num(S[(i+j + 1) % n]))
					f = true;
		if (f)continue;*/
		Int sum = 0;
		string now="";
		for (int j = n-1; j >= 0; j--){
			switch (S[(i + j) % n]){
			case '+':sum += stoll(now); now = ""; break;
			case '-':sum -= stoll(now); now = ""; break;
			default:now = S[(i + j) % n] + now; break;
			}
			
		}
		sum += stoll(now);
		res = max(res, sum);
		
	}
	cout << res << endl;
	return(0);
}