#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int a[n + 1];
  int sum = 0;
  for (int i = 1; i <= n; i++) cin >> a[i];
  for (int i = 1; i < n; i++)
    for (int j = i + 1; j <= n; j++) {
      sum += (a[i] ^ a[j]) % 1000000007;
    }
  cout << sum << endl;
  return 0;
}
