#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001


int main(){
	
	int n;
	cin>>n;
	
	vector<vector<int>> a(2);
	rep(i,n){
		int aa;
		cin>>aa;
		a[__builtin_popcount(aa)%2].push_back(aa);
	}
	mf_graph<int> G(n+2);
	int s = n,t = n+1;
	rep(i,a[0].size()){
		rep(j,a[1].size()){
			if(__builtin_popcount((a[0][i]^a[1][j]))==1)G.add_edge(i,a[0].size()+j,1);
		}
	}
	rep(i,a[0].size()){
		G.add_edge(s,i,1);
	}
	rep(i,a[1].size()){
		G.add_edge(a[0].size()+i,t,1);
	}
	int ans = n;
	ans -= G.flow(s,t);
	cout<<ans<<endl;
		
	return 0;
}