s = gets.chomp
n = s.length
(1...n).each { |i|
	 if s[i - 1] == "+" || s[i - 1] == "-"
	 	next
	 end
	 if s[i] == "+"
	 	s[i] = "-"
	 elsif s[i] == "-"
	 	s[i] = "+"
	 end
}
puts eval(s)