#coding: utf-8
##yuki_193
import sys
import re

s=raw_input()
n=len(s)


res=-sys.maxint
for i in xrange(n):
 x=s[-1]
 s=x+s
 s=s[:-1]
 if s[0]=='+' or s[0]=='-':
  continue
 if s[-1]=='+' or s[-1]=='-':
  continue
 while s[0]=='0':
  s=s[1:]
 sa=re.sub(r'\+[0]+','+',s)
 sb=re.sub(r'\-[0]+','-',sa)
 if sb[-1]=='+' or sb[-1]=='-':
  sb=sb[:-1]
 res_temp=eval(sb)
 if res<res_temp:
   res=res_temp
print res