s = gets.chomp
ans = -1000000000000
(0...(s.length)).each do |i|
  _s = s[i..-1] + s[0...i]
  if _s =~ /^\d+([+-]\d+)*$/
    a = _s.split(/[+-]/)
    b = _s.split(/\d+/)
    __s = ""
    __s << a[0].to_i.to_s
    (1...(a.length)).each{|j|__s << b[j]; __s << a[j].to_i.to_s}
    a = eval(__s)
    ans = a if a > ans
  end
end
p ans