hs={}
gets
x=gets.split.map{|e| e.to_i}
x.each{|e|
	hs[e]=1
}
hs2={}
hs2[0]=0
cs=16.times.map{0}
hs.keys.sort.each{|e|
	p1=32768
	p2=15
	while (p1&e)==0
		p1/=2
		p2-=1
	end
	
	e2=(p1-1)&e
	hs3={}
	if hs2.key?(e)==false
		hs2.each{|k,v|
			hs3[k^e]=0
		}
		cs[p2]+=1
	end
	hs2.update(hs3)
}
puts hs2.size