#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(void)
{
	int i, j, k, len, cnt=1, x[10], y, sum=-99999999;
	char s[11], s2[11], c, *a;
	scanf("%s", &s);
	len = (int)strlen(s);

	for( i = 0; i < len; i++) {
		for( j = 0; j < len-1; j++) {
			c = s[j];
			s[j] = s[j+1];
			s[j+1] = c;
		}

		strcpy(s2, s);
		if( s2[0] != '+' && s2[0]!= '-' && s2[len-1] != '+' && s2[len-1] != '-') {
			a = strtok(s2, "+-");
			x[0] = atoi(a);
			for( k = 1; a = strtok(NULL, "+-"); k++ ){
				x[k] = atoi(a);
			}


			y = x[0];
			for( k = 0; k < len ; k++ ) {
				if( s[k] == '+' ) {
					y += x[cnt];
					cnt++;
				} else if( s[k] == '-' ) {
					y -= x[cnt];
					cnt++;
				}
			}
			cnt = 1;
			if( y > sum ) sum = y;
		}
	}
	printf("%d\n", sum);

	return 0;
}