#!/usr/bin/python
import re
from itertools import chain
flatten = lambda listOfLists: chain.from_iterable(listOfLists)

s = raw_input()
hamark = float('-inf')
for i in xrange(len(s)):
    x = s[i:] + s[:i]
    z = re.split('\d+', x)
    if len(z[0] + z[-1]):
        continue
    y = map(int, re.split('[\\+|-]', x))
    z = z[1:]
    w = ''.join(map(str, flatten(zip(y, z))))
    hamark = max(hamark, eval(w))
print hamark