S = input()


def check(s):
    if T.startswith("+") or T.startswith("-"):
        return False
    if T.endswith("+") or T.endswith("-"):
        return False
    for i in range(len(s) - 1):
        if s[i] in "-+" and s[i + 1] in "-+":
            return False
    return True


res = 0
for i in range(len(S)):
    T = S[i:] + S[:i]
    if not check(T):
        continue
    res = max(res, eval(T))

print(res)