s = input()
import copy
import re
ss = [ s ]
ans = []
for i in range(len(s)):
  ss.append( ss[-1][1:] + ss[-1][0] )
  try:
    if ss[-1][0] not in ['+', '-'] and ss[-1][-1] not in ['+', '-']:
      ans.append( eval(ss[-1]) )
  except:... 
print(max(ans))