#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<n;i++)
#define LOOP(i,x,n) for(int i=x;i<n;i++)
#define ALL(v) (v).begin(),(v).end()
#define PB push_backs
#define MP make_pair
#define FR first
#define SC second
#define int long long
using namespace std;
const int MOD=1000000007;
const int INF=1000000009;

signed main(){
  int n;
  cin>>n;
  vector<int> a(n);
  REP(i,n)cin>>a[i];
  set<int> s;
  s.insert(0);
  REP(i,n){
    for(auto x : s){
      int tmp=(0)xor(x)xor(a[i]);
      s.insert(tmp);
    }
  }
  cout<<s.size()<<endl;
    return 0;
}