S = raw_input()
ans = -999999
for i in xrange(len(S)):
    s = S[i:] + S[:i]
    while "+0" in s or "-0" in s:
        s = s.replace("+0", "+").replace("-0", "-")
    while s[0] == "0": s = s[1:]
    if s[0] in "+-" or s[-1] in "+-": continue
    ans = max(ans, eval(s))
print ans