def myeval(S):
    C = ""
    op = ""
    res = 0
    for i in range(len(S)):
        if S[i] in "0123456789":
            C += S[i]
        else:
            T = int(C)
            C = ""
            if op == "+":
                res += T
            elif op == "-":
                res -= T
            else:
                res = T
            op = S[i]
    T = int(C)
    if op == "+":
        res += T
    elif op == "-":
        res -= T
    return res

S = input().rstrip()
ans = 0
for i in range(len(S)):
    T = S[i:] + S[0:i]
    #print(T)
    if T[0] in "0123456789" and T[-1] in "0123456789":
        ans = max(ans, myeval(T))
print(ans)