#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <vector>
#include <cstring>
#define SIZE 12
#define INF 1000000000000LL

using namespace std;
typedef long long int ll;

char str[SIZE];

int main()
{
	scanf("%s",&str);
	int n=strlen(str);
	ll ret=-INF;
	for(int i=0;i<n;i++)
	{
		if(str[i]=='-'||str[i]=='+') continue;
		if(str[(i+n-1)%n]=='-'||str[(i+n-1)%n]=='+') continue;
		ll calc=0;
		int now=i;
		while(str[now]!='-'&&str[now]!='+')
		{
			calc*=10LL;
			calc+=str[now]-'0';
			now=(now+1)%n;
			if(now==i) break;
		}
		while(now!=i)
		{
			bool up=str[now]=='+';
			now=(now+1)%n;
			ll vl=0;
			while(str[now]!='-'&&str[now]!='+')
			{
				vl*=10LL;
				vl+=str[now]-'0';
				now=(now+1)%n;
				if(now==i) break;
			}
			if(up) calc+=vl;
			else calc-=vl;
		}
		ret=max(ret,calc);
	}
	printf("%lld\n",ret);
	return 0;
}