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

ans = []
for _ in range(len(S)):
    formula.rotate(1)
    s = ''.join(formula)
    if s[0] != '+' and s[0] != '-' and s[-1] != '+' and s[-1] != '-':
        num = ''
        f = []
        for n in s:
            if n.isdigit():
                num += n
            else:
                f.append(str(int(num)))
                f.append(n)
                num = ''
        f.append(str(int(num)))
        m = ''.join(f)
        ans.append(eval(m))

print(max(ans))