S=raw_input()
size=len(S)
ans=-1

def itr(s):
    if s[0] =='+' or s[0]=='-' or s[size-1]=='+' or s[size-1]=='-':
        return -1
    ret=0
    cur=0
    sign=1
    for c in s:
        if c=='+':
            ret+=sign*cur
            cur=0
            sign=1
        elif c=='-':
            ret+=sign*cur
            cur=0
            sign=-1
        else:
            cur*=10
            cur+=ord(c)-ord('0')
    return ret+sign*cur
    
for i in range(size):
    ans=max(ans,itr(S[i:]+S[:i]))
print ans