#include <iostream>
#include <string.h>
#include <algorithm>

int main(void){
	int a,b,c;
	char s[50];
	char s1[50]="";
	std::string s2;
	int total,cnt;
	int max=-100000000;

	std::cin>>s;
	
	for(int i=0; i<strlen(s); i++){

		for(int k=i,a=0; a<strlen(s); a++,k++){
			k%=strlen(s);
			s1[a]=s[k];
		}
		
		if(s1[0]!='+' && s1[0]!='-' && s1[strlen(s)-1]!='+' && s1[strlen(s)-1]!='-'){
		
			b=0;
			while(s1[b]>='0' && s1[b]<='9'){
				s2+=s1[b];
				b++;
			}
			b--;

			total= std::atoi(s2.c_str());
			s2="";

			for(int k=b; k<strlen(s1); k++){
				
				

				if(s1[k]=='+'){
					k++;
					while(s1[k]>='0' && s1[k]<='9'){
						s2+=s1[k];
						k++;
					}
					k--;
					c=std::atoi(s2.c_str());
					
					s2="";
					total+=c;
				}
		
				else if(s1[k]=='-'){
					k++;
					while(s1[k]>='0' && s1[k]<='9'){
						s2+=s1[k];
						k++;
					}
					k--;
					c=std::atoi(s2.c_str());
					s2="";
					total-=c;
				}	
				
					
			}

			max=std::max(max,total);
		}		
	}
	
	std::cout<<max<<std::endl;	

}