def f(x):
    x = x.replace('+', ' + ').replace('-', ' - ')
    L = []
    for i in x.split():
        if i in '+-':
            L += i
        else:
            L += str(int(i))
    return ''.join(L)

s = list(input())

L1 = []
for _ in range(len(s)):
    t = s.pop(0)
    s += t
    if s[0] not in '+-' and s[-1] not in '+-':
        L1 += [''.join(s)]
        
L2 = [eval(f(i)) for i in L1]

print(max(L2))