def strip_lzero(_s):
    s = [str(int(i)) for i in _s.strip().replace("+", " ").replace("-", " ").split(" ")]
    ret = []
    ret.append(s.pop(0))
    for c in _s:
        if c == "+" or c == "-":
            ret.append(c)
            ret.append(s.pop(0))
    return "".join(ret)

S = input()

max_v = -1000000000000
for i in range(len(S)):
    s = S[i:] + S[:i]
    if s[0] == "+" or s[0] == "-" or s[len(S)-1] == "+" or s[len(S)-1] == "-":
        continue
    else:
        s = strip_lzero(s)
        v = eval(s)
        if max_v < v:
            max_v = v
print(max_v)