s = gets.chomp
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] < '0' || s2[0] > '9' || s2[-1] < '0' || s2[-1] > '9'
	max = [eval(s2), max].max
end
puts max