#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 100000000001

long long get(string s){
	
	if(!isdigit(s[0]))return -Inf;
	if(!isdigit(s.back()))return -Inf;
	rep(i,s.size()-1){
		if(!isdigit(s[i])&&!isdigit(s[i+1]))return -Inf;
	}
	
	long long ret= 0LL;
	bool add = true;
	while(s.size()!=0){
		long long t = 0;
		while(s.size()>0&&isdigit(s[0])){
			t *= 10;
			t += s[0]-'0';
			s.erase(s.begin());
		}
		if(add)ret += t;
		else ret -= t;
		if(s.size()==0)break;
		if(s[0]=='+')add = true;
		else add = false;
		s.erase(s.begin());
	}
	return ret;
}

int main(){	
	
	string s;
	cin>>s;
	long long ans = -Inf;
	
	rep(i,s.size()){
		s.insert(s.begin(),s.back());
		s.pop_back();
		ans = max(ans,get(s));
	}
	cout<<ans<<endl;
	
	
	return 0;
	
}