import re
import copy

s = input()
num_list = re.split('[^0-9]', s)
operator_list = [c for c in list(s) if c == '+' or c == '-']
res_list = []

for i in range(len(num_list)):
    len_num = len(num_list[i])
    pattern = None
    for j in range(len_num - 1):
        cur_list = copy.copy(num_list)
        cur_op_list = copy.copy(operator_list)
        
        if i == 0:
            cur_list[i - 1] = cur_list[i - 1] + cur_list[i][: j + 1]
            cur_list[i] = cur_list[i][j + 1 :]
        elif i == len(num_list) - 1:
            cur_list[0] = cur_list[i][j + 1 :] + cur_list[0]
            cur_list[i] = cur_list[i][: j + 1]
        else:
            pattern = 1
            cur_list[0] = cur_list[-1] + cur_list[0]
            cur_list[-1] = cur_list[i][j + 1 :]
            cur_list[i] = cur_list[i][: j + 1]
            cur_list = cur_list[i + 1 :] + cur_list[: i + 1]
            
#         print('cur_list: {}'.format(cur_list))
#         print('---------------')
        
        if pattern == 1:
            cur_op_list = cur_op_list[i :] + cur_op_list[: i]
            
#         print('cur_op_list: {}'.format(cur_op_list))
#         print('---------------')
        
        cur_num = int(cur_list[0])
        for k in range(0, len(operator_list)):
            if cur_op_list[k] == '+':
                cur_num += int(cur_list[k + 1])
            else:
                cur_num -= int(cur_list[k + 1])

        res_list.append(cur_num)

original = int(num_list[0])
for i in range(0, len(operator_list)):
    if operator_list[i] == '+':
        original += int(num_list[i + 1])
    else:
        original -= int(num_list[i + 1])
res_list.append(original)

res = max(res_list)

print(res)