#!/usr/bin/env python
#coding:utf8

def read():
    return raw_input()


def work(s):
    ans = -(1 << 30)

    for L in range(len(s)):
        expr = s[L:] + s[:L]

        if expr[0]  == '+' or expr[0]  == '-' or \
           expr[-1] == '+' or expr[-1] == '-':
           continue
        
        ans = max(ans, eval(expr))

    print ans


if __name__ == "__main__":
    work(read())