s = gets.strip
n = s.size
s = s+s
ans = -10000000000000
n.times{|i|
  t = s[i,n]
  next if not (/\d/=~t[0] && /\d/=~t[-1])
  ans = [ans, eval(t.gsub(/(\d+)/){|m|m.to_i})].max
}
p ans