s=gets.chomp
n=s.size
s=s+s
ans=nil
n.times{|i|
	s2=s[i,n]
	if s2[0].match(/\d/)==nil
		next
	end
	if s2[s2.size-1].match(/\d/)==nil
		next
	end
	s2=s2.gsub(/(?<=[+^-])0+(?=[1-9]+)/,"")
	if ans==nil
		ans=eval(s2)
	else
		ans=[eval(s2),ans].max
	end
}
puts ans