#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  vector<int> a(n);
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  long long ans = 0;
  for (int rep = 0; rep < 2; rep++) {
    for (int r = 2; r < n; r++) {
      long long sum = a[r - 1];
      for (int l = r - 2; l >= 0; l--) {
        if (a[l] < a[r] && sum == (a[l] ^ a[r])) {
          ans++;
        }
        sum += a[l];
        if (__builtin_clzll(sum) < __builtin_clzll(a[r])) {
          break;
        }
      }
    }
    if (rep == 0) {
      reverse(a.begin(), a.end());
    }
  }
  cout << ans << endl;
}
