#include <iostream>
#include <vector>

using namespace std;

#define REP(i,a,b) for(int i=a;i<(int)b;i++)
#define rep(i,n) REP(i,0,n)

int const M = 1<<15;

int N; int A[5001];
bool dp0[M], dp1[M];

int main() {

  cin >> N; rep(i, N) cin >> A[i];

  dp0[0] = 1;
  rep(i, N) {
    rep(j, M) {
      dp1[j] = dp0[j] || dp0[j^A[i]];
    }
    rep(j, M) {
      dp0[j] = dp0[j] || dp1[j];
    }
  }

  int ans = 0;
  rep(i, M) ans += dp0[i];
  cout << ans << endl;

  return 0;
}