import re


S = input()


def check(s):
    return not re.match(r"^[^+-].*[^+-]$", s) is None


print(
    max(
        [
            eval(s)
            for s in [re.sub(r"0+(\d+)", r"\1", t) for t in [S[i:] + S[:i] for i in range(len(S))]]
            if check(s)
        ]
    )
)