# -*- coding: utf-8 -*-
S = raw_input()
N = len(S)
mx = 0
for _ in xrange(N):
    S = S[1:] + S[0]
    if S[0] == "+" or S[0] == "-" or S[-1] == "+" or S[-1] == "-":
        continue
    ans = eval(S)
    mx = max(mx, ans)
print mx