#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
#define rep(i,n) for(i=0;i<n;++i)
#define each(itr,c) for(__typeof(c.begin()) itr=c.begin(); itr!=c.end(); itr++)
#define mp make_pair
#define pb push_back
#define fi first
#define sc second

int main(int argc, char const *argv[]) {
  int i,j;

  int n;
  cin >>n;
  std::vector<int> a(n+1);
  rep(i,n) cin >>a[i+1];

  //a_iまでの全てのxor
  std::vector<int> x(n+1);
  x[0]=0;
  rep(i,n) x[i+1]=x[i]^a[i+1];

  set<int> s;
  rep(i,n+1){
    rep(j,i+1){
      //printf("  %d\n",x[i]^x[j]);
      s.insert(x[i]^x[j]);
    }
  }

  std::cout << s.size() << std::endl;
  return 0;
}