S = input()


def check(s):
    if s[0] in "+-":
        return False
    if s[-1] in "+-":
        return False
    for i in range(len(s) - 1):
        if s[i] in "-+" and s[i + 1] in "-+":
            return False
    return True


res = -float("inf")
for i in range(len(S)):
    T = S[i:] + S[:i]
    if not check(T):
        continue
    t = []
    i = 0
    r = 0
    while i < len(T) and T[i].isdigit():
        r *= 10
        r += int(T[i])
        i += 1
    t.append(r)

    while i < len(T):
        if T[i] == "+":
            o = 1
        else:
            o = -1
        i += 1

        r = 0
        while i < len(T) and T[i].isdigit():
            r *= 10
            r += int(T[i])
            i += 1

        r = t[-1] + o * r
        t.pop(-1)
        t.append(r)

    res = max(res, t[0])

print(res)