#include <stdio.h>

int calc(char *s){
	int i;
	int num = 0;
	int sum =0;
	char symbol = '+';
	for(i=0;;i++){
		if( '0'<= s[i] && s[i] <= '9'){
			num *= 10;
			num += (s[i] - '0');
		}else{
			if(symbol == '+'){
				sum += num;
			}else{
				sum -= num;
			}
			num = 0;
			symbol = s[i];
		}
		
		if(s[i] == '\0'){break;}
	}
	
	return sum;
}

int main(void){
	int i,n;
	int ans = 	-20000000;
	char s[15];
	
	scanf("%s", s);
	
	for(n=0;s[n]!=0;n++);
	
	for(i=0;i<n;i++){
		int c,k;
		char tmp = s[0];
		for(k=0;k<n-1;k++){
			s[k] = s[k+1];
		}
		s[k] = tmp;
		
		if(s[0] == '+' || s[0] == '-' || s[n-1] == '+' || s[n-1] == '-'){
			continue;
		}
		c = calc(s);
		if(ans < c){
			ans = c;
		}
	}
	
	printf("%d\n", ans);
	return 0;
}