#include <bits/stdc++.h>

using namespace std;

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n,b[61] = {};
    unsigned long long tmp;
    cin >> n;
    vector< vector<int> > m(n, vector<int>(61, 0));
    for (int i = 0; i < n; i++) {
        cin >> tmp;
        for(int j = 0; j < 62; j++) {
            m[i][j] = (tmp >> j) & 1;
            if (m[i][j]) b[j] = 1;
        }
    }
    int c = count(b, b + 62, 1);
    unsigned long long ans = 1LL << min(c, n);
    cout << ans << "\n";
    return 0;
}