#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import itertools


INF = 2 ** 31 - 2


def solve(s):
    answer = -INF
    length = len(s)
    f = lambda c: c in "+-"
    for i in range(length):
        to_eval = ""
        for key, group in itertools.groupby((s * 2)[i: i + length], f):
            if key:
                to_eval += "".join(group)
            else:
                to_eval += "".join(group).lstrip("0")
        if to_eval.startswith(('+', '-')) or to_eval.endswith(('+', '-')):
            continue
        try:
            answer = max(answer, eval(to_eval))
        except SyntaxError as err:
            pass
    return answer


def main():
    print(solve(input()))


if __name__ == '__main__':
    main()