def calc(s):
    if s[0] in ['+', '-'] or s[-1] in ['+', '-']:
        return -10**18
    
    nums = []
    opes = []
    n = 0
    
    for i in range(len(s)):
        if s[i] in ['+', '-']:
            nums.append(n)
            n = 0
            opes.append(s[i])
        else:
            n = 10*n+int(s[i])
            
            if i==len(s)-1:
                nums.append(n)
    
    res = nums[0]
    
    for ni, oi in zip(nums[1:], opes):
        if oi=='+':
            res += ni
        else:
            res -= ni
    
    return res
    
S = input()
ans = -10**18

for i in range(len(S)):
    s = S[i:]+S[:i]
    ans = max(ans, calc(s))
    
print(ans)