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

void calc(char *operator, char operant[], int *sum)
{
	if (*operator == '+') *sum += atoi(operant);
	else *sum -= atoi(operant);
}

void push(char *x, char operant[], int *top)
{
	operant[*top] = *x;
	++*top;
	operant[*top] = '\0';
}

void shift(char S[], int *length)
{
	char tmp = S[*length - 1];
	int i;
	for (i = *length - 1; i > 0; --i) S[i] = S[i - 1];
	S[0] = tmp;
}

int main(void)
{
	char S[11], operant[10], operator;
	int length, top, sum, max = INT_MIN, i, j;
	scanf("%s", S);
	length = strlen(S);
	for (i = 0; i < length; ++i) {
		if (S[0] == '+' || S[0] == '-' || S[length - 1] == '+' || S[length - 1] == '-') {
			shift(S, &length);
			continue;
		}
		operator = '+';
		top = 0;
		sum = 0;
		for (j = 0; j < length; ++j) {
			if (S[j] == '+' || S[j] == '-') {
				calc(&operator, operant, &sum);
				operator = S[j];
				top = 0;
			}
			else push(&S[j], operant, &top);
		}
		calc(&operator, operant, &sum);
		if (max < sum) max = sum;
		shift(S, &length);
	}
	printf("%d", max);
	return 0;
}