from collections import deque
S = input()
formula = deque(S)

ans = [eval(S)]
for _ in range(len(S)-1):
    formula.rotate(1)
    s = ''.join(formula).lstrip('0')
    if s[0] != '+' and s[0] != '-' and s[-1] != '+' and s[-1] != '-':
        ans.append(eval(s))

print(max(ans))