s = gets.chomp
p s
max = 0
(1...s.length).each do |i|
#	print s[0, i], " ", s[i..-1], "\n"
	s2 = s[i..-1] + s[0, i]
	next if s2[0] == '+' || s2[0] == '-' || s2[-1] == '+' || s2[-1] == '-'
	p s2
	sum = 0
	ope_index = s2.index(/[+|-]/)
	sum = s2[0, ope_index].to_i
#	p sum
	ope = s2[ope_index]
#	p ope
	s2 = s2[ope_index+1..-1]
#	p s2
	while s2 != nil
#	p ope
#	p s2
		ope_index = s2.index(/[+|-]/)
#		p ope_index
		if !ope_index
			if ope == '+'
				sum += s2.to_i
			else
				sum -= s2.to_i
			end
			break
		else
			if ope == '+'
				sum += s2[0..ope_index - 1].to_i
			else
				sum -= s2[0..ope_index - 1].to_i
			end
			ope = s2[ope_index]
			s2 = s2[ope_index + 1..-1]
		end
	end
	max = [sum, max].max
end
puts max