#!/usr/bin/python
import re
from itertools import chain
flatten = lambda listOfLists: chain.from_iterable(listOfLists)
rotate = lambda arr, n: arr[n:] + arr[:n]

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